Monsters

Medium Monstrosity · Neutral · Darkvision 60 ft.; Passive Perception 11

Large Undead · Lawful Evil · Darkvision 60 ft.; Passive Perception 9

Large Monstrosity · Chaotic Evil · Darkvision 60 ft.; Passive Perception 17

Medium Beast · Unaligned · Passive Perception 10

Medium Undead · Lawful Evil · Darkvision 60 ft.; Passive Perception 11

Medium Undead (Cleric) · Lawful Evil · Truesight 60 ft.; Passive Perception 19

Large Fiend (Demon) · Chaotic Evil · Truesight 120 ft.; Passive Perception 11

Medium Fiend · Neutral Evil · Darkvision 120 ft.; Passive Perception 15

Large Fiend · Neutral Evil · Passive Perception 11

Medium Humanoid · Neutral · Passive Perception 12

Large Ooze · Unaligned · Blindsight 60 ft.; Passive Perception 8

Small Beast · Unaligned · Darkvision 30 ft.; Passive Perception 12

Large Giant · Chaotic Evil · Darkvision 60 ft.; Passive Perception 8

Animals

Large Fiend · Lawful Evil · Darkvision 60 ft.; Passive Perception 14

Large Aberration · Neutral · Darkvision 120 ft.; Passive Perception 11

Tiny Beast · Unaligned · Darkvision 120 ft.; Passive Perception 15

Large Monstrosity · Unaligned · Darkvision 60 ft.; Passive Perception 15

Medium Beast · Unaligned · Darkvision 60 ft.; Passive Perception 14

Large Celestial · Chaotic Good · Passive Perception 16