Ulvenwald Hydra [Shadows over Innistrad Prerelease Promos] Planechase if Clockwork Avian attacked or

if Clockwork Avian attacked or blocked this combat

Conjured from the bowels of hell

Whenever you cast a creature spell with mana value 5 or greater

Target opponent creates a 1/1 green Hippo creature token

Ulvenwald Hydra [Shadows over Innistrad Prerelease Promos] Planechase if Clockwork Avian attacked orSet: Shadows over Innistrad Prerelease Promos Type: Creature Hydra Rarity: Mythic Cost: {4}{G}{G} Reach Ulvenwald Hydra's power and toughness are each equal to the number of lands you control. When Ulvenwald Hydra enters the battlefield, you may search your library for a land card, put it onto the battlefield tapped, then shuffle.