Goblin Knight Crazz

Whenever you sacrifice an artifact Goblin
Knight Crazz gets +X/+X until end of turn,
where X is that sacrificed artifacts converted
mana cost.
{1}{r}, Sacrifice an artifact: Search your library
for an artifact card with mana value equal to 1
plus the sacrificed artifact's mana value, put that
card onto the battlefield, then shuffle. Activate
only as a sorcery.