Sources
CR
Type
Size
Alignment
Movement

Giant Corrupted Rat

Small Monstrosity, Unaligned

Armor Class 13
Hit Points 18 (4d6)
Speed 30 ft., climb 30 ft.
STR
7
-2
DEX
16
+3
CON
12
+1
INT
2
-4
WIS
10
+0
CHA
4
-3
Skills Perception +12, Stealth +5
Senses Darkvision 60 ft., passive Perception 12
Languages
Challenge 1/2 (100 XP)

Traits

Death Burst. The rat explodes when it dies. Constitution Saving Throw DC 11, each creature in a 5-foot Emanation originating from the rat. Failure: 5 (2d4) Acid damage. Success: Half damage.

Actions

Bite. Melee Attack Roll: +5, Reach 5 ft. Hit:6 (1d6 + 3) Piercing damage plus 5 (2d4) Acid damage.

Lore

The rats of Elmshire sometimes grow to unusual proportions. Though frightening, these dog-size rodents were little more than a local nuisance until an ex-adventurer's magic transformed them into feral terrors. Caustic drool drips from their chattering incisors, and glowing pustules pockmark their bloated, ghastly hides.