Sin Scent. The wrathspawn has advantage on Wisdom (Perception) checks made to detect creatures that reflect its sin. The Dm determines which creatures are appropriately sinful.

Reckless. At the start of its turn, the wrathspawn can choose to gain advantage on all melee weapon attack rolls during that turn, but attack rolls against it have advantage until the start of its next turn.

Brute. The wrathspawn's melee weapon attacks deal one additional die of damage (included in the attack).

Multiattack. The wrathspawn makes two Claw attacks.

Claw. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 7 (2d4 + 3) slashing damage. 

Bite. Melee Weapon Attack: +5 to hit, reach 5ft., 1 target. Hit: 7(2d4 +3) piercing damage.

Aggressive. The wrathspawn moves up to its speed towards a hostile creature it can see.