The Hydra of Hamuri Isle

(As this Saga enters and after your draw step, put a lore counter on it. Sacrifice after III.)
I: Exile target creature you control until this Saga leaves the battlefield. If you do, create a 5/4 green Hydra token with haste and menace.
II: Destroy target artifact and target artifact you control.
III: Sacrifice the Hydra created by this Saga and create 3 Treasure tokens.
Contract 3