StS2 / Guides / Bosses / Waterfall Giant
Waterfall Giant
Boss Guide Act 1 — Underdocks

Waterfall Giant

Explosion on death (30-50+ dmg based on accumulated Steam). Pressure Gun escalates +5 per use.

HP 250
A8+ 260

Mechanics

Steam EruptionExplosion on DeathSelf-Heal

Danger Turns

Explosion on death (30-50+ dmg based on accumulated Steam). Pressure Gun escalates +5 per use.

Attack Patterns

01 Main Pattern (repeating after Pressurize)
T1
Pressurize

Gains 15 Steam Eruption (20 A9+).

T2
Stomp

15 dmg (16 A9+), applies Weak 1, gains 3 Steam Eruption.

T3
Ram

10 dmg (11 A9+), gains 3 Steam Eruption.

T4
Siphon

Heals 15 HP, gains 3 Steam Eruption.

T5
Pressure Gun

20 dmg (23 A9+) — increases by 5 each use, gains 3 Steam Eruption.

T6
Pressure Up

13 dmg (14 A9+), gains 3 Steam Eruption.

02 Death Sequence
TOn Death
About To Blow

Becomes invulnerable for 1 turn.

TNext Turn
Explode

Deals damage equal to total Steam Eruption stacks (typically 30-50+).

Strategy

1

The explosion IS the threat — save Block and potions for the turn after it reaches 0 HP.

2

Every turn adds more Steam Eruption stacks, making the explosion bigger. Kill fast.

3

Siphon heals 15 HP — sustained damage prevents it from dragging the fight out.

4

Apply Weak before the killing blow to reduce explosion damage.

5

Doom effect kills without triggering the explosion (bypasses death sequence).

6

Pressure Gun escalates +5 per use — in long fights this becomes the biggest attack.

Best Counters

Strong Block for explosionWeak on death turnFast kill to minimize SteamDoom bypasses explosion entirely
GGEZ.GG · Slay the Spire 2 · Early Access · March 2026
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