Impervious Greatwurm (Buy-A-Box) [Guilds of Ravnica] HER001-P ' but I cannot

' but I cannot

Set: Seventh Edition Type: Creature — Wall Rarity: Uncommon Cost: {1}{U}{U} Defender

Set: M15 Prerelease Challenge Type: Legendary Planeswalker — Garruk Rarity: Common 0: Put a 2/2 green Wolf creature token onto the battlefield

Leviathan enters the battlefield tapped and doesn't untap during your untap step

Set: Innistrad: Crimson Vow Type: Creature — Spirit Rarity: Rare Cost: {1}{U}{U} Flying

Impervious Greatwurm (Buy-A-Box) [Guilds of Ravnica] HER001-P ' but I cannotSet: Guilds of Ravnica Type: Creature Wurm Rarity: Mythic Cost: {7}{G}{G}{G} Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Indestructible The ultimate answer to intrigue and subtlety.