Pack Tactics. The drake has advantage on an attack roll against a creature if at least one of the drake’s allies is within 5 feet of the creature and the ally isn’t incapacitated.

Surprise Attack. If the drake surprises a creature and hits it with an attack during the first round of combat, the target takes an extra 1d8 damage from the attack.

Undead Fortitude. Once per Turn If damage reduces the zombie to 0 hit points, it must make a Constitution saving throw with a DC of 3 + the damage taken, unless the damage is radiant or from a critical hit. On a success, the zombie drops to 1 hit point instead.

Bite. Melee Weapon Attack: +5 Bite to hit, one target. Hit: 4  (1d8 + 2) piercing damage.

Slam. Melee Weapon Attack: +4 to hit, one target. Hit: 4 (1d6 + 2) bludgeoning damage.