The Cannibal's Calling

While not evil per se, your acts of consumption would be shunned by most. To adventure as a Cannibal, you have learned to hide your customs from commoners but partake openly in front of enemies and trusted allies.

The Consumption of Rage

Starting at 3rd level, during rage, when you reduce a hostile opponent to 0 hit points, you gain temporary hit points equal your Constitution modifier + the sum of damage from the killing blow (minimum of 1) (maximum of CON Modifier + remaining HP) Once per short rest

Biting Rebuke

At 6th level, while in rage you can make a bite attack as a free reaction when struck in melee by an opponent. This attack deals 1d6 + Strength modifier damage, and on a hit the opponent must succeed DC Wisdom Save (wisdom mod * 2 + PB). If failed you regain the hp you deal.

Heart of Enemies

Beginning at 10th level, by consuming a heart of a humanoid you have participated in slaying within the past hour, you regain your PB class HP (if PB is 3, 3d12). You must finish a long rest to regain use of this feature.

Spirit of the Slain

At 14th level, by channeling the spirits of those you have eaten, you deal double crit damage on your next crit. You can only do this a number of times each day equal to the number of enemies hearts you have eaten in the past 24 hours, and only once per turn.