Slay the Spire 2 Monster

Aeonglass

Aeonglass is a boss encounter with 512 base HP and 535 HP at high Ascension. Its documented pattern is Ebb → Eye Lasers → Increasing Intensity → repeat.

Encounter: Boss
Base HP: 512
High Ascension HP: 535
Known moves: 3
Act: Act 3 - Glory

Fight plan

Prepare for a repeating attack, multi-hit, setup cycle

Aeonglass alternates Ebb, Eye Lasers, and Increasing Intensity in the documented main-branch pattern. Build enough consistent block for the attacks and use the non-damage turn to advance your win condition.

Moves and intents

Move	Intent	Damage	Block
Ebb	Attack + Defend	26 (32 A)	33
Eye Lasers	Attack	11 x 2 (12 A)	-
Increasing Intensity	Status + Buff	-	-

Attack pattern

Ebb → Eye Lasers → Increasing Intensity → repeat

Preparation notes

Use the move table as a damage threshold, not a script that replaces reading the fight. Ascension, multiplayer scaling, powers, and patch changes can alter the exact line. For boss-specific planning, continue to the boss guide hub.

Aeonglass turn plan

Ebb combines damage with 33 Block, so a weak damage turn can leave the fight moving backward. Eye Lasers is a two-hit attack, which matters for effects that respond per hit. Increasing Intensity is the setup turn in the documented three-move loop.

Use the setup turn for scaling, card draw, or a damage push, but keep the next Ebb threshold in mind. A plan that spends every safe turn preparing and never accelerates damage can still lose the long fight.

Preparation checklist

Enter with a damage clock, repeatable defense, and one way to rescue a poor draw. The table above is a threshold guide; beta balance, Ascension, powers, and multiplayer scaling can change the exact line.

Block 26 damage on base difficulty or 32 at high Ascension for Ebb, before other modifiers.
Account for two hits from Eye Lasers: 11 x2 base or 12 x2 at high Ascension.
Use potions before a bad hand becomes unrecoverable.

Used in real decisions

Guides that mention Aeonglass

Aeonglass Boss Guide: Moves, Turn Plan, and CountersBeat Aeonglass with a practical turn plan for Ebb, Eye Lasers, and Increasing Intensity, plus current branch values, potion jobs, and deck checks.Slay the Spire 2 All Bosses Guide: Act-by-Act Prep and CountersPrepare for every documented Slay the Spire 2 boss with an act-by-act checklist, linked move data, and the deck jobs that prevent boss losses.Toasty Mittens v0.110 Guide: Exhaust Priority for Every CharacterIs Toasty Mittens good after its v0.110 rework? Use this exhaust order, character fit check, curse and Status advice, and pass conditions.Act 3 Boss Preparation GuideA late-run Slay the Spire 2 boss preparation guide covering complete win conditions, deck consistency, potion planning, and final shop decisions.Slay the Spire 2 v0.107.0 Patch Strategy GuideA practical v0.107.0 beta patch guide for Slay the Spire 2, covering stability changes, Aeonglass attention, beta routing, and what players should actually adjust.

Quick answers

Aeonglass FAQ

What is Aeonglass's attack pattern?

The documented main-branch pattern is Ebb, Eye Lasers, Increasing Intensity, then repeat.

How much HP does Aeonglass have?

The current main-branch data lists 512 base HP and 535 HP at high Ascension.