Warlock, Master of Light

Anytime you or one of your creatures destroy an opponents creature, you gain a charge of light

Devour-use one light charge, and sacrifice a creature, gain {b}{b}{b}

Arcbolt grenade-use 2 light charges, deal 1 damage to each opponent and each creature they control

Well of Radiance-use 3 light charges, each creature you control gets +2/+2 until end of turn