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System Reference Document 5.2.1
Giant Rat
Small Beast, Unaligned
AC 13   Initiative +3 (13)
HP 7 (2d6)
Speed 30 ft., Climb 30 ft.
MOD SAVE MOD SAVE MOD SAVE
Str 7 −2 −2 Dex 16 +3 +5 Con 11 +0 +0
Int 2 −4 −4 WIS 10 +0 +0 Cha 4 −3 −3
Skills Perception +2
Senses Darkvision 60 ft.; Passive Perception 12
Languages None
CR 1/8 (XP 25; PB +2)
Traits
Pack Tactics. The rat has Advantage on an attack roll 
against a creature if at least one of the rat’s allies is 
within 5 feet of the creature and the ally doesn’t have 
the Incapacitated condition.
Actions
Bite. Melee Attack Roll: +5, reach 5 feet. Hit: 5 (1d4 
+ 3) Piercing damage.
Giant Scorpion
Large Beast, Unaligned
AC 15   Initiative +1 (11)
HP 52 (7d10 + 14)
Speed 40 ft.
MOD SAVE MOD SAVE MOD SAVE
Str 16 +3 +3 Dex 13 +1 +1 Con 15 +2 +2
Int 1 −5 −5 WIS 9 −1 −1 Cha 3 −4 −4
Senses Blindsight 60 ft.; Passive Perception 9
Languages None
CR 3 (XP 700; PB +2)
Actions
Multiattack. The scorpion makes two Claw attacks and 
one Sting attack.
Claw. Melee Attack Roll: +5, reach 5 ft. Hit: 6 (1d6 + 3) 
Bludgeoning damage. If the target is a Large or smaller 
creature, it has the Grappled condition (escape DC 13) 
from one of two claws.
Sting. Melee Attack Roll: +5, reach 5 ft. Hit: 7 (1d8 + 3) 
Piercing damage plus 11 (2d10) Poison damage.
Giant Seahorse
Large Beast, Unaligned
AC 14   Initiative +1 (11)
HP 16 (3d10)
Speed 5 ft., Swim 40 ft.
MOD SAVE MOD SAVE MOD SAVE
Str 15 +2 +2 Dex 12 +1 +1 Con 11 +0 +0
Int 2 −4 −4 WIS 12 +1 +1 Cha 5 −3 −3
Senses Passive Perception 11
Languages None
CR 1/2 (XP 100; PB +2)
Traits
Water Breathing. The seahorse can breathe only 
underwater.
Actions
Ram. Melee Attack Roll: +4, reach 5 ft. Hit: 9 (2d6 
+ 2) Bludgeoning damage, or 11 (2d8 + 2) Bludgeoning 
damage if the seahorse moved 20+ feet straight toward 
the target immediately before the hit.
Bonus Actions
Bubble Dash. While underwater, the seahorse moves 
up to half its Swim Speed without provoking Opportu-
nity Attacks.
Giant Shark
Huge Beast, Unaligned
AC 13   Initiative +3 (13)
HP 92 (8d12 + 40)
Speed 5 ft., Swim 60 ft.
MOD SAVE MOD SAVE MOD SAVE
Str 23 +6 +6 Dex 11 +0 +0 Con 21 +5 +5
Int 1 −5 −5 WIS 10 +0 +0 Cha 5 −3 −3
Skills Perception +3
Senses Blindsight 60 ft.; Passive Perception 13
Languages None
CR 5 (XP 1,800; PB +3)
Traits
Water Breathing. The shark can breathe only underwater.
Actions
Multiattack. The shark makes two Bite attacks.
Bite. Melee Attack Roll: +9 (with Advantage if the target 
doesn’t have all its Hit Points), reach 5 ft. Hit: 22 (3d10 
+ 6) Piercing damage.
Giant Spider
Large Beast, Unaligned
AC 14   Initiative +3 (13)
HP 26 (4d10 + 4)
Speed 30 ft., Climb 30 ft.