Shapechanger. The wereox can use its action to polymorph into a Large ox-humanoid hybrid or into a Large bull, 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.

Charge (Ox or Hybrid Form Only). If the wereboar moves at least 15 feet straight toward a target and then hits it with its tusks on the same turn, the target takes an extra 10 (2d6) slashing damage.

Beast of Burden. The wereox is considered to be a Huge animal for the purpose of determining its carrying capacity. 

Multiattack (Humanoid or Hybrid Form Only). The wereox makes two attacks, only one of which can be with its goar.

Goar (Ox or Hybrid Form Only). Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 4) piercing damage. If the target is a humanoid, it must succeed on a DC 12 Constitution saving throw or be cursed with wereboar lycanthropy.

Greataxe (Humanoid or Hybrid Form Only). Melee Weapon Attack: +6 to hit, reach 5 ft., one target. Hit: 10 (1d12 + 4) slashing damage.