Monsters

Monsters are the ”basic enemies” of Slay the Spire, and landing on their icon on the map will incur a battle with one or more, depending on the floor. When they are defeated, they will drop coins, a selection of three cards, and sometimes a potion.

Act I

First 3 encounters

Name	Details	Encounter chance
Cultist	-	25%
Jaw Worm	-	25%
2 Louses	Each Louse has 50% chance of being either red or green.	25%
Small Slimes	Acid Slime (M) or Spike Slime (M) + Acid Slime (S) or Spike Slime (S)	25%

Remaining encounters

Name	Details	Encounter chance
Gremlin Gang	4 randomly chosen from 2 Mad, 2 Sneaky, 2 Fat, 1 Wizard and 1 Shield Gremlin.	6.25%
Large Slime	Acid Slime (L) or Spike Slime (L).	12.5%
Lots of Slimes	3 Spike Slime (S) + 2 Acid Slime (S).	6.25%
Blue Slaver	-	12.5%
Red Slaver	-	6.25%
3 Louses	Each Louse has 50% chance of being either red or green.	12.5%
2 Fungi Beasts	-	12.5%
Exordium Thugs	Any Louse or Acid/Spike Slime (M) + Looter or Cultist or Any Slaver.	9.375%
Exordium Wildlife	Fungi Beast or Jaw Worm + Any Louses or Acid/Spike Slime (M).	9.375%
Looter	-	12.5%

Act II

First 2 encounters

Name	Details	Encounter chance
Spheric Guardian	-	20%
Chosen	-	20%
Shelled Parasite	-	20%
3 Byrds	-	20%
2 Thieves	Looter + Mugger	20%

Remaining Encounters

Name	Encounter chance
Chosen and Byrd	7%
Cultist and Chosen	10%
Sentry and Spheric Guardian	7%
Snake Plant	21%
Snecko	14%
Centurion and Mystic	21%
3 Cultists	10%
Shelled Parasite and Fungi Beast	10%

Act III

First 2 encounters

Name	Details	Encounter chance
3 Darklings	-	33.33%
Orb Walker	-	33.33%
3 Shapes	3 randomly chosen from 2 Repulsors, 2 Spikers and 2 Exploders.	33.33%

Remaining encounters

Name	Details	Encounter chance
4 Shapes	4 randomly chosen from 2 Repulsors, 2 Spikers and 2 Exploders.	12.5%
Maw	-	12.5%
Spheric Guardian and 2 Shapes	Shapes are randomly chosen from Repulsors, Spikers and Exploders.	12.5%
3 Darklings	-	12.5%
Writhing Mass	-	12.5%
Jaw Worm Horde	3 Jaw Worms (Hard mode)	12.5%
Spire Growth	-	12.5%
Transient	-	12.5%