Bat Hound

The bat hound can't willingly move into running water or to a space up to 20 feet above running water. If it starts its turn in running water, it takes 10 Acid damage and has the Frightened condition until the start of its next turn.

If it doesn't have the Incapacitated condition and isn't wearing heavy armor, the bat hound can extend its membranous wings to move up to 5 feet horizontally for every 1 foot it descends in the air.

The bat hound can climb difficult surfaces, including along ceilings, without needing to make an ability check.

Melee Attack Roll: +5, reach 5 ft. Hit: 8 (1d10 + 3) Piercing damage plus 3 (1d6) Necrotic damage. If the target is a creature, the bat hound regains a number of Hit Points equal to the Necrotic damage taken, and if the target is a Medium or smaller creature, it has the Grappled condition (escape DC 13).

The bat hound takes the Dash and Disengage actions, and until the end of the turn, needn't spend extra movement to move a creature it is grappling.

Trigger: The bat hound takes damage from a fall and isn't wearing heavy armor. {@actResponse} The bat hound extends its wings and reduces the fall's damage to 0.