Mortis Bat
Traits
Echolocation. The bat can’t use its blindsight while deafened.
Keen Hearing. The bat has** advantage **on Wisdom (Perception) checks that rely on hearing.
Actions
Bite. Melee Weapon Attack: +0 to hit, reach 5 ft., 1 target. Hit: 1d4 piercing damage plus 1d4 poison damage. The bat attacks with its Bite.