Siren's Call [Alpha Edition] Collectors' Edition Spend this mana only to

Spend this mana only to cast artifact spells

"My Soldiers know that they need never fear for their protection

Monkey Monkey Monkey gets +1/+1 for each nonland permanent whose name begins with the chosen letter

"Swallowing his eye

A sphere pushes equally in all directions

Siren's Call [Alpha Edition] Collectors' Edition Spend this mana only toSet: Alpha 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.