Darksteel Hydra

Indestructible
Darksteel Hydra enters the battlefield with X oil counters on it.
Darksteel Hydra's power and toughness are each equal to twice the number of oil counters on it.
When Darksteel Hydra enters the battlefield, conjure a card named Darksteel Ingot and a card named Darksteel Plate into your hand.