Terror Dive. If the pterafolk is flying and dives at least 30 feet forward toward a target, and then hits that target with a melee weapon attack, the target is frightened until the end of its next turn. 

Undead Fortitude. If damage reduces the zombie to 0 hit points, it must make a Constitution saving throw with a DC of 5+ the damage taken, unless the damage is radiant or from a critical hit. On a success, the zombie drops to 1 hit point instead.

Multiattack. The pterafolk makes three attacks: one with its bite and two with its claws. Alternatively, it makes two melee attacks with its Flying slam.

Bite. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 7 (2d4+ 2) piercing damage.

Claws. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) slashing damage.

Flying Slam/Slam. Melee Weapon Attack: +4 to hit, reach 5 ft., one target. Hit: 5 (1d6+2) bludgeoning damage. If hit with two flying slams/slams, the target must succeed on a DC 14 Dexterity saving throw (Strength if on the ground) or fall 100 ft., or be knocked prone.