Fafnir, Gold Tyrant

Flying
{t}Sacrifice X dwarves, create X treasures
Sacrifice a non token Dragon, create X 1/1 Dwarves, where X is the sacrificed creature's power
Activate only as a sorcery
{2}{p/b}{p/r} Sacrifice X treasures, Fafnir, Gold Tyrant gets +X/+X, where X is the amount of treasures sacrificed this way