Exploding Charret

Crew Goblin (tap an untapped goblin you control, Exploding Charret becomes a creature until end of
the turn)
when Exploding Charret attacks sacrifice all
tapped goblins you control at the end of the
combat, then Exploding Charret deals X damage
to all non-goblins creatures where X is the
number of goblins that died this turn
the storm leaded by the thunderhead