Weregator

Shapechanger. The weregator can use its action to polymorph into a Large gator-humanoid hybrid or into a Large alligator, or back into its true form, which is humanoid. Its statistics, other than its size and AC, are the same in each form. Any equipment it is wearing or carrying isn't transformed. It reverts to its true form if it dies.

Keen Senses. The weregator has advantage on Wisdom (Perception) checks that don't rely on sight.

Multiattack. In gator form, the weregatorr makes one bite and one tail attack. In humanoid form, it makes two glaive attacks. In hybrid form, it can attack like a gator or a humanoid.

Bite (Gator or Hybrid Form Only). Melee Weapon Attack:  +10 to hit, reach 5 ft., one target. Hit: 19 (2d12 + 6) piercing damage. If the weregator chooses to the target must succeed on a DC 16 Strength saving throw or be restrained in the weregators jaws. If the target is a humanoid, it must succeed on a DC 16 Constitution saving throw or be cursed with weregator lycanthropy.

Tail (Gator or Hybrid Form Only). Melee Weapon Attack:  +10 to hit, reach 10 ft., one target. Hit: 17 (3d6 + 6) bludgeoning damage. If the creature hit by this attack is Medium sized or smaller must succeed on a DC 16 Strength saving throw or be knocked prone.

Glaive (Humanoid or Hybrid Form Only). Melee Weapon Attack:  +10 to hit, reach 15 ft., one target. Hit: 17 (2d10 + 6) slashing damage.