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System Reference Document 5.2.1
Seahorse
Tiny Beast, Unaligned
AC 12   Initiative +1 (11)
HP 1 (1d4 − 1)
Speed 5 ft., Swim 20 ft.
MOD SAVE MOD SAVE MOD SAVE
Str 1 −5 −5 Dex 12 +1 +1 Con 8 −1 −1
Int 1 −5 −5 WIS 10 +0 +0 Cha 2 −4 −4
Skills Perception +2, Stealth +5
Senses Passive Perception 12
Languages None
CR 0 (XP 0; PB +2)
Traits
Water Breathing. The seahorse can breathe only 
underwater.
Actions
Bubble Dash. While underwater, the seahorse moves 
up to its Swim Speed without provoking Opportu-
nity Attacks.
Spider
Tiny Beast, Unaligned
AC 12   Initiative +2 (12)
HP 1 (1d4 − 1)
Speed 20 ft., Climb 20 ft.
MOD SAVE MOD SAVE MOD SAVE
Str 2 −4 −4 Dex	14 +2 +2 Con 8 −1 −1
Int 1 −5 −5 WIS 10 +0 +0 Cha 2 −4 −4
Skills Stealth +4
Senses Darkvision 30 ft.; Passive Perception 10
Languages None
CR 0 (XP 10; PB +2)
Traits
Spider Climb. The spider can climb difficult surfaces, 
including along ceilings, without needing to make an 
ability check.
Web Walker. The spider ignores movement restrictions 
caused by webs, and the spider knows the location of 
any other creature in contact with the same web.
Actions
Bite. Melee Attack Roll: +4, reach 5 ft. Hit: 1 Piercing 
damage plus 2 (1d4) Poison damage.
Swarm of Bats
Large Swarm of Tiny Beasts, Unaligned
AC 12  Initiative +2 (12)
HP 11 (2d10)
Speed 5 ft., Fly 30 ft.
MOD SAVE MOD SAVE MOD SAVE
Str	5 −3 −3 Dex	15 +2 +2 Con 10 +0 +0
Int 2 −4 −4 WIS 12 +1 +1 Cha	4 −3 −3
Resistances Bludgeoning, Piercing, Slashing
Immunities Charmed, Frightened, Grappled, Paralyzed, 
Petrified, Prone, Restrained, Stunned
Senses Blindsight 60 ft.; Passive Perception 11
Languages None
CR 1/4 (XP 50; PB +2)
Traits
Swarm. The swarm can occupy another creature’s 
space and vice versa, and the swarm can move through 
any opening large enough for a Tiny bat. The swarm 
can’t regain Hit Points or gain Temporary Hit Points.
Actions
Bites. Melee Attack Roll: +4, reach 5 ft. Hit: 5 (2d4) 
Piercing damage, or 2 (1d4) Piercing damage if the 
swarm is Bloodied.
Swarm of Insects
Medium Swarm of Tiny Beasts, Unaligned
AC 11 Initiative +1 (11)
HP 19 (3d8 + 6)
Speed 20 ft., Climb or Fly 20 ft. (GM’s choice)
MOD SAVE MOD SAVE MOD SAVE
Str 3 −4 −4 Dex 13 +1 +1 Con	14 +2 +2
Int 1 −5 −5 WIS 7 −2 −2 Cha 1 −5 −5
Resistances Bludgeoning, Piercing, Slashing
Immunities Charmed, Frightened, Grappled, Paralyzed, 
Petrified, Prone, Restrained, Stunned
Senses Blindsight 30 ft.; Passive Perception 8
Languages None
CR 1/2 (XP 100; PB +2)
Traits
Spider Climb. If the swarm has a Climb Speed, the 
swarm can climb difficult surfaces, including along ceil-
ings, without needing to make an ability check.
Swarm. The swarm can occupy another creature’s 
space and vice versa, and the swarm can move through 
any opening large enough for a Tiny insect. The swarm 
can’t regain Hit Points or gain Temporary Hit Points.
Actions
Bites. Melee Attack Roll: +3, reach 5 ft. Hit: 6 (2d4 + 1) 
Poison damage, or 3 (1d4 + 1) Poison damage if the 
swarm is Bloodied.