Wall of Air [Alpha Edition] Gateway 2007 They have "Sacrifice this creature:

They have "Sacrifice this creature: Add {C}

each player may put a permanent card from their hand onto the battlefield

within the confines of the Consulate's laws

Set: Magic 2010 Type: Artifact Rarity: Rare Cost: {5} Each creature gets +1/+1 for each other creature on the battlefield that shares at least one creature type with it

the player puts it into their graveyard

Wall of Air [Alpha Edition] Gateway 2007 They have "Sacrifice this creature:Set: Alpha Edition Type: Creature Wall Rarity: Uncommon Cost: {1}{U}{U} Defender, flying (This creature can't attack, and it can block creatures with flying.) "This 'standing windstorm' can hold us off indefinitely? Ridiculous!" Saying nothing, she put a pinch of salt on the table. With a bang she clapped her hands, and the salt disappeared, blown away.