Gar-Rett

{x}{b}, {t} Lightning — Deal {x} damage directly to target creature.

— Rule of Two —
{t} Choose a creature, that you command, as your apprentice. Chosen creature receives a +1/1 bonus equal to number of dead apprentices.
{x}{b} Betray your apprentice and "discard" them to the graveyard, where {x} is the number of apprentices betrayed.