Darksteel Hydra

Flying Double Strike Deathtouch Hexproof Trample
Darksteel Hydra is indestructible.
Whenever Darksteel Hydra is blocked, put a 2/2 Hydra token on to the battlefield.
{c}{c}Lands your under opponent's control, produce only {c}mana until Darksteel Hydra leaves the battlefield.
When Darksteel Hydra enters your graveyard pay {c}{c}{c} and return Darksteel Hydra to your hand.