Siren's Call [Beta Edition] Scars of Mirrodin If it's a land card

If it's a land card

Activate only during your upkeep

She sees all living things as prototype machines

Set: Portal Three Kingdoms Type: Legendary Creature — Human Soldier Warrior Rarity: Rare Cost: {4}{G} Horsemanship (This creature can't be blocked except by creatures with horsemanship

Set: Eighth Edition Type: Land Rarity: Rare Whenever City of Brass becomes tapped

Siren's Call [Beta Edition] Scars of Mirrodin If it's a land cardSet: Beta Edition Type: Instant Rarity: Uncommon Cost: {U} Cast this spell only during an opponent's turn, before attackers are declared. Creatures the active player controls attack this turn if able. At the beginning of the next end step, destroy all non Wall creatures that player controls that didn't attack this turn. Ignore this effect for each creature the player didn't control continuously since the beginning of the turn.