Mutavault [Champs and States] Vehicle This ability can't cause the

This ability can't cause the total number of +1/+0 counters on Clockwork Avian to be greater than four

if Nether Shadow is in your graveyard with three or more creature cards above it

If you control an Urza's Mine and an Urza's Power-Plant

"The secret to invention is to see something in your mind

Set: Portal Type: Sorcery Rarity: Rare Cost: {2}{G} Green creatures you control gain forestwalk until end of turn

Mutavault [Champs and States] Vehicle This ability can't cause theSet: Champs and States Type: Land Rarity: Rare {T}: Add {C}. {1}: Mutavault becomes a 2 2 creature with all creature types until end of turn. It's still a land.