TL;DR
Doormaker is gone. The Act 3 boss on the main branch is now Aeonglass, and it changes how every character has to draft. Aeonglass feeds Wither cards into your deck during the fight; hold them at end of turn and they hurt you, and the pressure compounds the longer the fight runs. The takeaway for every class: you need scaling damage assembled by the mid-game, or the boss outpaces you. Pure block-and-stall plans lose the race. On the current community win-rate order, item:silent leads, then item:necrobinder, item:ironclad, item:regent, and item:defect. If you want one pick that adapts to any run, take Silent and lean on shiv or Sly discard tempo.
The State of the Spire
Major Update 2 landed on June 19, 2026 as patch v0.107.1. Mega Crit shipped it as four patches in one, folding the entire v0.104 through v0.107 beta run onto the main branch in a single drop. If you skipped the beta, you are meeting all of it at once: new card text, reworked elites, and a new Act 3 boss.
Three system-level changes reach every player. Steam Workshop support is live. A new Bestiary screen tracks the monsters you have fought. And the random number generation got reworked so the game's multiple PRNGs run independently, which closes the old curse-prediction correlation that let you read upcoming events off item:neows-bones.
This snapshot reflects the live main-branch state as of June 2026. The win-rate figures below are a community aggregate, not Mega Crit telemetry. Read them as a directional order, not a leaderboard.
The Boss That Rewrote the Draft Rule
Aeonglass replaces Doormaker as the Act 3 boss, and it is the single change that reshapes the meta. Its mechanic is Wither. Over the course of the fight, Aeonglass pushes Wither cards into your deck and hand. A Wither left in hand at end of turn deals damage to you, and the cost of carrying that pile climbs as the fight drags on. Damage scales nonlinearly past the early turns, so a deck that has not built real offense by the time the Wither stack grows simply loses the trade.
Wither cannot be upgraded and no longer Retains, which means item:runic-pyramid stopped abusing it. What clears the pile cleanly is Exhaust. Ironclad and Defect both exhaust Wither out of the fight, and Silent's discard does the same job. That is the new universal imperative: every class wants either a way to delete the Wither cards or enough scaling damage to win before they pile up. Block-only Frost stalling, which used to be the safest plan in the game, is now the clearest way to time out and die.
For the full mechanical breakdown of the Act 3 fight and how relic offers shift around it, see our Act 3 boss relic guide.
Character Read
The community win-rate aggregate from sts2guides.com, drawn from roughly 23,000 runs as of June 16, puts the classes in this order: Silent 35.6 percent, Necrobinder 32.1 percent, Ironclad 31.7 percent, Regent 30.4 percent, Defect 29.8 percent. The spread is narrow and the population is third-party, so trust the ordering and the reasoning behind it more than the decimals.
Silent sits on top. Shiv and Sly-discard tempo race the boss before the Wither stack matters, and her discard engines double as Wither removal. Untouchable and Pounce both got buffed this patch, and Predator dropped to Common, so the aggressive lines come together more often. item:blade-of-ink took a small hit (Inky enchantment +2 down to +1), so it is no longer the unquestioned top shiv scaler, but the archetype's speed carries it.
Necrobinder got real buffs and climbs as a result. Death March, Sic 'Em, and The Scythe all gained value, and the Doom execute plan scales straight into Aeonglass because a big execute does not care how long the Wither pile has grown. Debilitate lost a turn of duration, so do not lean on it as a stall tool.
Ironclad answers Aeonglass naturally. Strength plus Exhaust clears the Wither pile while building toward a damage ceiling. Conflagration is reworked into 2 damage to all enemies four to five times, and Drum of Battle is now a 1-cost Skill that draws 2 and refunds energy when exhausted. Both reshape how the AoE and tempo turns play out.
Regent has a new payoff in the Parry and Sword Sage loop. Parry's item:sovereign-blade now grants Block directly, and Sword Sage gives Sovereign Blade a Replay, so the two chain into a strong defensive engine. Several Block cards got nerfed, though, which hurts the older stall lines and keeps Regent in the middle.
Defect drops to the back. The pure Frost-Tank plan that block-stalls a boss to death is exactly what Aeonglass punishes, so Defect's relevance now leans on damage. The Lightning buffs carry that load: Shatter evokes every orb twice, Tesla Coil triggers Lightning twice, Hyperbeam hits harder, and item:infused-core now adds Lightning orb damage. Build for output, not for a Frost wall.
Top Archetypes Right Now
Sly Discard Silent is the dominant build on the main branch. Pack Sly-tagged cards, stack discard enablers, and a single well-built turn cascades through auto-plays, with each discard firing another. The engine cycles faster than anything else Silent runs, and the discards clear Wither as a free side effect. The setup risk is the same as ever: if Act 1 does not hand you the Sly pieces, the deck stays a collection of cards. When it assembles, it is the fastest way to close Act 3.
Build: a8c8e15e42c2For the card-by-card draft order and upgrade priority, read the Silent Sly Discard build guide.
Doom Execute Necrobinder is the highest-ceiling answer to Aeonglass. Stack Doom on the boss, survive the window, and the execute lands regardless of how the Wither math has compounded. The buffs to Death March and the summon line this patch make the early game less punishing than it was, though Necrobinder still asks the most from a new player out of the cast.
Build: ec604309e13dStrength Exhaust Ironclad is the cleanest structural fit for the new boss. Strength builds the damage, Exhaust deletes Wither, and the reworked Conflagration gives you repeatable multi-target pressure for the elites on the way in. This is the build to pick if you want a plan that does not depend on a perfect draft to handle the Wither pile.
Universal Power Cards
item:paper-phrog boosts the damage multiplier from Vulnerable, which pays off on any deck that can apply it reliably (item:bash being the obvious source). The bonus stacks across every attack for the rest of the run.
item:ice-cream carries unspent energy to the next turn, killing the worst tempo leak in the game. It lets you hold energy for an explosive turn instead of dumping cards to avoid waste.
item:pantograph heals you to full at the start of every boss fight, so chip damage from Act 3 elites disappears before the pull. For any character without combat healing, it is the best anti-fragility relic available.
item:tungsten-rod caps single-hit damage to you, which matters most on the big incoming attacks that would otherwise end a combo turn. It pairs naturally with Necrobinder's Doom plan, where you only need to survive one boss hit while Doom ticks down.
item:mummified-hand makes a card in your hand free after you play a Power. At worst it discounts a filler card; at best it turns a setup turn into one that also fires your most expensive attack.
For where these and every other relic land in the current order, see the relic tier list.
Tier Lists Go Stale Fast
Major Update 2 consolidated a whole beta era at once, which means a lot of older guidance is now wrong. New card text (Scare, the reworked Conflagration, Drum of Battle, Parry, Sword Sage, and Shatter) and a new boss are live for everyone on the main branch. Any tier list written before June 2026 is reading a different game. Check the patch tag on anything you reference, and if a list still calls a pure Frost block plan the safest run, it predates Aeonglass.
What to Play for Your Next Run
For the highest floor and the most adaptable run, take Silent. Shiv and Sly-discard tempo race Aeonglass, and the discards clear Wither for free, so the build punishes the new boss instead of feeding it.
For the highest ceiling, take Necrobinder. The Doom execute scales past anything Aeonglass throws at the pile, and the buffs this patch smoothed out the early game that used to sink the character.
For the most reliable answer to the Wither problem, take Ironclad. Strength plus Exhaust handles the boss mechanic by default, which is the cleanest structural fit in the current cast.
Whatever you pick, the same question decides the run now: can your deck assemble scaling damage before Aeonglass outpaces it? Drop a list into the deck evaluator below and find out where yours stands.