Dryad Arbor [From the Vault: Realms] Champions of Kamigawa the Wall of Opposition is

the Wall of Opposition is but an illusion

Set: Revised Edition Type: Creature — Human Assassin Rarity: Rare Cost: {1}{B}{B} {T}: Destroy target tapped creature

The earth's real treasure is far deeper

Set: Coldsnap Type: Instant Rarity: Rare Cost: {5}{B}{B} You may exile two black cards from your hand rather than pay this spell's mana cost

This effect doesn't remove Green Ward

Dryad Arbor [From the Vault: Realms] Champions of Kamigawa the Wall of Opposition isSet: From the Vault: Realms Type: Land Creature Forest Dryad Rarity: Mythic (Dryad Arbor isn't a spell, it's affected by summoning sickness, and it has "{T}: Add {G}.")