The Devouerer

A warlock who serve Hadar, Beelzebub or the devouerer of worlds.

Gluttenus frenzy

You go in a starving  rage and gain advantage on strength attack rolls for 1 min, you olso have a unarmed bite attack that deals 1d6+str piecing damage, as longe as the effect is in use. (You can`t use spells while Gluttenus frenzyis active).

You can use this feature a number of times equal to your Proficiency.

whenever you finish a long rest you regain all expended uses.

 You can use strength to cast warlock spells.

Well fed

You eat the double of what you normally eat.

You heal +5 hp when you eat or make a bite attack that hits, (+2 instead).

Titanium jaw

You can eat anything as food. (dirt, wood, Stone, metal, e.t.c.).

When gluttenus frenzy is activ, the bite attack is a d8 and you can make two attack actions with bite.

You have a bite that deals 1d6+str piecing damage.

Monstrous stomach

You can use spells when Gluttenus frenzy is active.

You heal half of all the damage you deal rounded up.

Gluttenus frenzy can now be used a number of times equal to half you level.

Added spell list

lvl 1: Arms of hadar. expeditious retreat.

lvl 2: locate animal or plant. enlarge/reduse.

lvl 3: Counter spell. water breathing.

lvl 4: summon aberration. banishment.

lvl 5: contagion. Greater restoration.