Shapechanger. The wereape can use its action to polymorph into a Large ape-humanoid hybrid or into a Large ape, or back into its true form, which is humanoid. Its statistics, other than its size, 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.

Multiattack. In ape form, the wereape makes two fist attacks. In humanoid form, it makes two maul attacks. In hybrid form, it attacks like an ape or like a humanoid.

Bite (Ape Form Only). Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 7 (1d4 + 5) piercing damage. If the target is a humanoid, it must succeed on a DC 15 Constitution saving throw or be cursed with wereape lycanthropy.

Fist (Ape or Hybrid Form Only). Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) bludgeoning damage.

Rock (Ape or Hybrid Form Only). Ranged Weapon Attack: +8 to hit, range 35/70 ft., one target. Hit: 20 (5d6 + 5) bludgeoning damage.

Maul (Humanoid or Hybrid Form Only). Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 17 (4d6 + 5) bludgeoning damage in hybrid form, or 12 (2d6 + 5) bludgeoning damage in humanoid form.