Bat

Sense: blindsight 60 ft, passive perception 11
Speed: 5 ft, fly 30 ft
Armor class: 12 Hit points: 1 (1d4 - 1)
Strength: 2(-4) Dexterity: 5(+2)
Constitution: 8(-1) Intelligence: 2(-4)
Wisdom: 12(+1) Charisma: 4(-3)
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Echolocation. Deafened prevents blindsight.
Keen Hearing. Advantage on Perception checks
Melee Weapon Attack: Single target
Bite. hit +0, range 5 ft, 1 piercing damage.