Tiny Beast, unaligned
Armor Class 12
Hit Points 1 (1d4-1)
Speed fly +30, walk +5
Challenge 0
Senses blindsight 60 ft., passive Perception 11
Echolocation. The bat can't use its blindsight while deafened.
Keen Hearing. The bat has advantage on Wisdom (Perception) checks that rely on hearing.
Bite. Melee Weapon Attack: +0 to hit, reach 5 ft., one creature. Hit: 1 piercing damage.
Source: 5e Core Rules · OGL/Open