TH15 Upgrade Priority Guide 2026: What to Build First at Town Hall 15

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📅 Originally Published: April 9, 2026
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🔄 Last Updated: April 29, 2026
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✏️ What changed: Corrected Spell Tower level unlock order (Level 1=Rage, Level 2=Poison, Level 3=Invisibility) · Fixed external citations · Added Dragon Duke priority context · Author attribution added

⚡ KEY TAKEAWAYS

Day 1 priority: Build Monolith and both Spell Towers immediately — they transform your defensive profile overnight.
Upgrade Archer Queen and Grand Warden together first among heroes — don’t max one while neglecting others.
TH15 unlocks Dragon Duke (Hero Hall Level 9, March 2026) — the 6th hero. Unlocking him early is a genuine 2026 competitive advantage.
Root Rider unlocks via Barracks Level 17 — one of the strongest TH15 troops in the current meta. Upgrade Barracks early.
Spell Tower spell levels unlock in order: Level 1 = Rage, Level 2 = Poison, Level 3 = Invisibility. You need to upgrade to Level 2 to access Poison.
Eagle Artillery and Scattershots lead the regular defense queue — skip Cannons and Mortars until later.
Walls matter less at TH15 — Root Rider and air attacks bypass them. Deprioritise until everything else is done.

TH15 Upgrade Priority Guide 2026: What to Build First at Town Hall 15

Q: What should I upgrade first at TH15?

Build the Monolith and both Spell Towers on Day 1. Simultaneously upgrade the Laboratory, an Army Camp, and Barracks to unlock Root Rider. These five Day 1 assignments set up the first month at TH15 efficiently.

Q: Should I unlock Dragon Duke at TH15?

Yes. Upgrading Hero Hall to Level 9 is a 2026 priority. TH15 is the only level where you can field all six heroes. At TH15 specifically, Dragon Duke's Royal Rampage is more impactful because defenses don't hit hard enough to shut him down quickly. Get him to Level 5 and max Fire Heart equipment after unlocking.

Q: What Spell does Spell Tower cast at each level?

Per Supercell's official TH15 release notes: Level 1 = Rage Spell. Level 2 = Poison Spell. Level 3 = Invisibility Spell. You must upgrade Spell Tower to Level 2 to access Poison — it does not start at Poison.

Q: How important are walls at TH15?

Less important than at lower Town Halls. Root Rider passes through walls; air strategies bypass them entirely. Upgrade walls with overflow Gold after core defense and hero queues are running. Never let walls compete with active upgrade timers.

Q: Which pet should I unlock first at TH15?

Frosty is the highest-priority pet at TH15. His freeze effect and Frostmite spawns make heroes harder to stop during core pushes. Phoenix is second priority — the revival effect during hero ability use frequently decides whether an attack 3-stars.

Q: What new troops does TH15 unlock?

TH15 unlocks Root Rider (via Barracks Level 17), Dragon Rider, Electro Titan, Recall Spell, and Revive Spell. Root Rider is the most immediately impactful — it passes through walls and is the cornerstone of ground smash strategies.

At TH15, your Day 1 builder assignments are Monolith and both Spell Towers — the two defenses that don’t exist at any lower level. After that: Laboratory, Army Camp, and Barracks to unlock Root Rider. Heroes follow the AQ + Grand Warden first principle, with Hero Hall Level 9 added as a 2026 priority to unlock Dragon Duke.

This guide follows the 2026 meta, accounting for the Dragon Duke’s March 2026 release and the current attack landscape dominated by Root Riders and Dragon Rider air strategies. All game data verified from Supercell’s official sources.

✍️ Clash Markets Editorial Team — updated April 29, 2026

What Does TH15 Unlock That Didn’t Exist Before?

Before setting upgrade priorities, it helps to know exactly what’s new at TH15. Several of these unlocks are genuinely high-impact and should shape your build order from Day 1.

Exclusive New Defenses

🏰 Spell Tower (×2) — TH15 Exclusive

The most impactful new defense at TH15. You build two of them, and each casts a defensive spell at a level tied to its upgrade level. According to Supercell’s official TH15 release notes: Level 1 casts Rage Spell (boosts nearby defenses and units), Level 2 casts Poison Spell (damages nearby enemies), and Level 3 casts Invisibility Spell (temporarily conceals nearby buildings and units). This means you need to upgrade a Spell Tower to at least Level 2 before you can load it with Poison — it does not start at Poison.

💀 Monolith (×1) — TH15 Exclusive

A single-target defense built and upgraded with Dark Elixir. Its key mechanic: it deals base damage plus bonus damage based on a percentage of the target’s max HP — making it devastating against heroes and high-HP troops like Golems and Electro Titans. At Level 2 (max at TH15), it has 5,050 hitpoints. Properly positioned in the core of your base, it can neutralize kill squads before they reach your Town Hall.

New Troops & Spells

Unlock	Type	Why It Matters
Root Rider	Ground Troop	Dominant at TH15 — attacks walls and passes through them. Cornerstone of current ground meta.
Dragon Rider	Air Troop	High-damage air unit. Core of Dragon Rider + Inferno Dragon air strategies.
Electro Titan	Ground Troop	Massive HP tank (Level 3: 7,200 HP). Absorbs enormous damage while your army pushes the core.
Recall Spell	Spell	Pulls troops back into a Siege Machine — high skill ceiling, high reward for repositioning.
Revive Spell	Spell	Temporarily revives a fallen hero — strong pairing with Archer Queen and Royal Champion walks.

The 2026 Addition: Dragon Duke at TH15

As of March 1, 2026, TH15 gained a major hero-side unlock. Dragon Duke — CoC’s 6th hero and second aerial unit — unlocks at Hero Hall Level 9, which requires TH15. TH15 is now the first level where you can field a full six-hero roster. Getting Hero Hall to Level 9 is a meaningful 2026 priority that didn’t exist before March. The Dragon Duke was announced and released alongside the Dragon Escape season — full details on his abilities and equipment are in our Dragon Duke guide.

📌 2026 Context: Dragon Duke’s passive ability (Royal Rampage) doubles his damage and adds 50% attack speed when no air units are within 6 tiles. At TH15, base defenses don’t hit hard enough to shut him down quickly — making him more impactful here than at TH17 or TH18. Unlocking him early is a genuine competitive advantage in war.

What Should Your First Builder Assignments Be on Day 1?

The first 24 hours at TH15 set the tone for how functional your base will be during the weeks of upgrading ahead. Two builders have clear, non-negotiable assignments. The rest follow a tight priority order.

Builder 1 → Build Monolith

Start construction immediately. Every day it’s not on the map is a day attackers don’t have to plan around it. Once built, keep upgrading it to Level 2 — the HP jump from 4,300 to 5,050 meaningfully increases its survivability during an attack.

Builder 2 → Spell Tower #1 (then #2)

Build the first Spell Tower, then immediately start the second. Note: at Level 1 they cast Rage Spell — useful, but Poison (Level 2) is the more broadly effective defensive load. Prioritise upgrading both Spell Towers to Level 2 shortly after construction to access Poison Spell. Two Spell Towers at Level 2 already deter most TH14 attackers from your base.

Builder 3 → Laboratory

Use a Book of Building here if you have one — this immediately opens your Lab queue for TH15-level troop upgrades. Root Rider and Dragon Rider upgrades should be your first Lab targets. Missing Lab time is the most invisible cost in CoC progression.

Builder 4 → Army Camp

TH15 Army Camps give +20 housing space total. More housing space directly means more Root Riders per army, which translates to stronger attacks immediately. This upgrade pays off in every single raid.

Builder 5 → Barracks (Level 17 unlocks Root Rider)

Barracks Level 17 is the unlock gate for Root Rider. If Root Rider isn’t available yet, this is the bottleneck. Once Barracks is done, shift this builder to Gold Storages to accumulate resources for the defense queue.

What Is the Right Hero Upgrade Order at TH15?

All four original heroes gain 10 new levels at TH15. The temptation is to focus on one — resist it. Upgrading in parallel keeps your attack options broader and avoids long war gaps where your best hero is unavailable.

Core Hero Upgrade Order

🏹 Archer Queen + Grand Warden — First Focus

Upgrade these two together as your primary hero investment. Archer Queen at Level 85 and Grand Warden at Level 60 is a solid functional target before shifting to the others. Queen Walk and Warden-supported pushes are the backbone of TH15 ground strategies. Bringing Archer Queen to TH15’s cap unlocks the Eternal Tome equipment level — a significant aura upgrade for the Warden.

⚔️ Barbarian King + Royal Champion — Second Wave

Once Queen and Warden are at workable levels, shift Dark Elixir to King and Champion. Royal Champion’s Recall Spell and Wall Wrecker synergy is increasingly valuable at TH15. Barbarian King remains the tanking anchor for ground pushes — his upgrade levels affect Iron Fist recovery, which determines whether your ground army survives into the base core.

🐉 Dragon Duke — Unlock Early, Get to Level 5 First

Hero Hall Level 9 unlocks Dragon Duke. Prioritise reaching Hero Hall Level 9 before maxing other heroes — the sooner he’s in your roster, the sooner you run two-lane hero dive strategies. Once unlocked, get him to Level 5 minimum. Level Fire Heart equipment immediately — it’s his only HP regeneration source since Healers don’t target air units. A Level 5 Duke with maxed Fire Heart already contributes meaningfully to TH15 air attacks.

⚠️ Don’t max one hero at the expense of others: A Level 90 Barbarian King with a Level 65 Archer Queen is weaker than both at Level 80. Hero synergy matters — you’re building a team of six, not a single carry.

Pets at TH15 — Four New Unlocks

TH15 unlocks four pets via the Pet House: Frosty, Phoenix, Diggy, and Poison Lizard. The Pet House needs four separate upgrades — each taking Builder time.

Pet	Best Paired With	Why	Priority
Frosty ❄️	Barbarian King / Archer Queen	Slows defenses + spawns Frostmites that absorb damage. King with Frosty tanks through compartments effortlessly.	1st
Phoenix 🔥	Barbarian King / Archer Queen	Revives the hero briefly after death — those extra seconds of invincible hero time frequently decide whether an attack 3-stars.	2nd
Diggy 🪨	Royal Champion	Tunnels underground and stuns its target on first hit. Particularly effective against Monoliths and Inferno Towers.	3rd
Poison Lizard ☠️	Any hero	Spawns Boogers that distract defenses and soak hits. Useful but less impactful than the top two.	4th

Which Defenses Should You Upgrade First at TH15?

After building Monolith and Spell Towers on Day 1, the rest of your defense queue follows a clear value hierarchy. Not all defenses are equal — and at TH15, the meta determines which ones actually decide whether an attack 3-stars.

Tier 1 — Upgrade Immediately

Eagle Artillery

The highest single-defense threat in your base. Eagle Artillery targets the troops deployed most — meaning it fires at the worst possible moment for the attacker. Its new TH15 level adds meaningful damage and HP. Always upgrade this first in your regular defense queue.

Scattershots (×2)

Reach Level 4 at TH15 with 5,100 hitpoints. Splash damage to air units from long range — directly countering Dragon Rider and Dragon-based strategies that dominate TH15 war. In the current air-heavy meta, upgraded Scattershots are non-negotiable.

Spell Tower → Level 2 (Poison), then Level 3 (Invisibility)

You built them on Day 1 at Level 1 (Rage Spell). Upgrade them to Level 2 as soon as possible to unlock the Poison Spell load — this is where Spell Towers become truly threatening against kill squads. Poison Spell Tower shreds hero groups, Minion Prince dives, and Queen Charge combinations. Level 3 (Invisibility) is a further upgrade worth doing but is less urgent than Poison.

Tier 2 — Upgrade Next

Inferno Towers (×2)

Reach Level 9 at TH15 with 3,700 HP. Your answer to tanky heroes and high-HP troops. Multi-target Infernos counter Dragon Duke specifically — experienced TH15 players position them to deny Royal Rampage. Set at least one to Multi-target mode.

X-Bows (×4)

High-DPS ground defenses that punish Root Rider smashes when positioned well. TH15 gives them a new level — worth upgrading after Infernos but before lower-tier defenses.

Air Defenses (×5)

Reach Level 13 at TH15. In an air-heavy meta, upgraded Air Defenses disrupt Dragon Rider pathing. Upgrade them before Cannons or Mortars — the current meta rewards anti-air investment disproportionately.

Tier 3 — Fill Remaining Builders

Wizard Towers, Archer Towers, Hidden Teslas, Cannons, Mortars, and Bomb Towers all receive one new level at TH15. Upgrade them in roughly that order — but only after Tiers 1 and 2 are complete. These defenses rarely determine whether an attack 3-stars at this level; the Monolith, Spell Towers, and Infernos do.

💡 Skip for now: Resource Collectors (Gold Mine, Elixir Collector, Dark Elixir Drill) have no new upgrade levels at TH15 — don’t touch them. This saves meaningful Builder time. Traps can also wait until all defenses are done.

Laboratory & Hero Equipment: What to Research First

Your Lab runs in parallel with the Builder queue — never let it sit idle. The troop upgrades you choose in the first weeks directly determine which attack strategies are available at full strength.

Lab Priority Order

Troop / Spell	Priority	Reason
Root Rider	Highest	Dominant ground troop at TH15. Higher level = more survivability through compartments.
Dragon Rider	Highest	Core of TH15 air attacks. Pairs directly with Dragon Duke for two-angle pressure.
Electro Dragon	High	Strong in Electro Dragon spam strategies. Higher level increases chain damage output.
Electro Titan	High	Massive HP tank for Super Witch Smash. Level 3 = 7,200 HP.
Super Witch (via Witch)	High	Super Witch Smash remains reliable at TH15. Witch upgrades feed directly into Boosted form power.
Miner	Medium	TH15 gives Miner two upgrades — the only troop with double upgrades here. Worth doing eventually.

Blacksmith Level 8 — Don’t Overlook It

TH15 upgrades the Blacksmith to Level 8, unlocking three new levels for Epic Equipment across all heroes plus the Haste Vial. The Epic Equipment level increases are the real value — maxing your Giant Gauntlet or Frozen Arrow to their new Level 27 caps meaningfully boosts hero performance. Upgrade Blacksmith early and keep ore farming active throughout TH15.

For which equipment to prioritize across your hero roster — including Dragon Duke’s Fire Heart and Flame Blower — see our Hero Equipment guide and the CoC Ore Farming guide for keeping your upgrade pipeline funded.

Walls & Resources: What the 2026 Meta Means for Them

Walls are a perennial question at every Town Hall level. The short answer at TH15: they matter less than they used to, and you should deprioritise them relative to everything covered above.

The reason is structural. The two strongest attack types at TH15 — Root Rider smash and Dragon Rider air strategies — effectively bypass walls. Root Riders tunnel through them; air attacks fly over entirely. Spending Gold on walls while your Inferno Towers and Eagle Artillery are still at TH14 levels is a poor trade. Upgrade walls with overflow Gold after your core defense queue is running, not alongside it.

📌 Practical wall target: Aim for roughly half your walls at TH14 level while defenses are upgrading. TH13-level walls at 11,000 HP are still adequate for compartment integrity — don’t pressure yourself to rush walls to max while builders are occupied with higher-impact upgrades.

Resource Buildings: Gold Mines, Elixir Collectors, and Dark Elixir Drills have no new upgrade level at TH15. Skip them entirely — this is a meaningful Builder time save. Gold and Elixir Storages do receive an upgrade; get those done early to accumulate resources for the defense queue.

Complete TH15 Upgrade Priority — Summary Checklist

Full priority order consolidated. This sequence assumes active play with five builders available.

Phase	What to Upgrade	Notes
Day 1	Monolith → Spell Tower ×2 → Lab → Army Camp → Barracks	Use Book of Building on Lab; Spell Towers start at Level 1 (Rage)
Week 1–2	Gold Storages → Eagle Artillery → Scattershots → Spell Tower → L2 (Poison) → Hero Hall L9	Spell Tower L2 unlocks Poison — key defensive upgrade. Hero Hall L9 unlocks Dragon Duke.
Ongoing — Heroes	AQ + GW together → BK + RC → Dragon Duke to L5	Never max one hero while others are far behind
Ongoing — Lab	Root Rider → Dragon Rider → Electro Dragon → Electro Titan	Never let Lab sit idle
Week 3–4	Monolith → L2 → Inferno Towers → X-Bows → Air Defenses	Multi-target Inferno counters Dragon Duke — key in 2026
Mid-term	Spell Tower → L3 (Invisibility) → Wizard Towers → Archer Towers → Hidden Teslas	Invisibility Spell Tower is useful but less urgent than Poison
Later	Cannons → Mortars → Bomb Towers → Traps	Low impact on war performance — finish last
Fill with Gold	Walls (half to TH14, half to TH15 levels)	Lower priority — Root Rider + air attacks bypass walls anyway

How Long Does TH15 Actually Take?

A full TH15 with all defenses, heroes, and lab researches completed takes roughly 12–16 months of consistent daily play from the point of upgrading — depending on Book usage and Gold Pass discounts. That’s before TH16. For players who want to start from a fully functional TH15 or TH17/TH18 without the wait, Clash Markets lists verified pre-built accounts with heroes already upgraded and Spell Towers at their correct levels — all accounts reviewed before listing. Buying and selling game accounts is against Supercell’s Terms of Service — review the terms before deciding.

📚 Related Guides

Frequently Asked Questions — TH15 Upgrade Priority

What should I upgrade first at TH15?

Build the Monolith and both Spell Towers on Day 1 — TH15 exclusive defenses that immediately change how attackers approach your base. Simultaneously upgrade the Laboratory (use a Book of Building to save time), an Army Camp for housing space, and Barracks to unlock Root Rider. These five Day 1 assignments set up the first month efficiently.

Should I unlock Dragon Duke at TH15?

Yes — upgrading Hero Hall to Level 9 to unlock Dragon Duke is a meaningful 2026 priority at TH15. TH15 is the only level where you can field all six heroes. At TH15 specifically, his Royal Rampage is more impactful than at higher levels because defenses don’t hit hard enough to shut him down quickly. Get him to Level 5 and max Fire Heart equipment as soon as possible after unlocking.

What Spell does Spell Tower cast at each level?

Per Supercell’s official TH15 release notes: Level 1 casts Rage Spell (boosts nearby defenses and units). Level 2 casts Poison Spell (damages nearby enemies). Level 3 casts Invisibility Spell (temporarily conceals nearby buildings and units). You need to upgrade Spell Tower to at least Level 2 before you can use Poison — it doesn’t start at Poison.

How important are walls at TH15?

Less important than at lower Town Halls in 2026. Root Rider — one of the dominant TH15 troops — passes through walls. Air strategies bypass them entirely. Upgrade walls with overflow Gold after your core defense and hero queues are running. Aim for a mix of TH13 and TH14 wall levels while main upgrades are active, then fill them in later.

Which pet should I unlock first at TH15?

Frosty is the highest-priority pet at TH15. Paired with Barbarian King or Archer Queen, his freeze effect and Frostmite spawns make the hero significantly harder to stop during a core push. Phoenix is second priority — the revival effect during hero ability use is one of the most attack-deciding mechanics in war at this level.

What new troops does TH15 unlock?

TH15 unlocks Root Rider (via Barracks Level 17 upgrade), Dragon Rider, and Electro Titan as new troops, plus Recall Spell and Revive Spell. Root Rider is the most immediately impactful — it passes through walls and is the cornerstone of ground smash strategies at TH15 and above.