Werecrocodile

Special Equipment: The werecrocodile wields a macana (see appendix C) when in humanoid or hybrid form.

Hold Breath (Crocodile or Hybrid Form Only): The werecrocodile can hold its breath for 15 minutes.

Shapechanger: The werecrocodile can use its action to polymorph into a crocodile-humanoid hybrid or into a crocodile, 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.

Multiattack (Humanoid or Hybrid Form Only): In humanoid form, the werecrocodile makes two macana attacks. In hybrid form, it can make two attacks, only one of which can be a bite.

Macana (Humanoid or Hybrid Form Only): Melee Weapon Attack +4 to hit, reach 5 ft., one target. Hit: 5 (1d6 + 2) slashing damage, or 6 ( 1d8 + 2) slashing damage if used with two hands.

Bite (Crocodile or Hybrid Form Only): Melee Weapon Attack: +4 to hit, reach 5 ft., one creature. Hit: 7 (1d10 + 2) piercing damage, and the target is grappled (escape DC 12). Until this grapple ends, the target is restrained, and the werecrocodile can't bite another
target. If the target is a humanoid, it must succeed on a DC 12 Constitution saving throw or be cursed with werecrocodile lycanthropy.