Siren's Call [Beta Edition] Mirrodin Besieged at the beginning of each

at the beginning of each of your upkeeps for the rest of the game

Creatures the active player controls attack this turn if able

Set: Unlimited Edition Type: Land — Mountain Forest Rarity: Rare ({T}: Add {R} or {G}

Set: Champions of Kamigawa Type: Legendary Land Rarity: Rare Boseiju

Set: Invasion Type: Creature — Phyrexian Zombie Assassin Rarity: Rare Cost: {2}{B}{B} {T}: Destroy target creature if it shares a color with the most common color among all permanents or a color tied for most common

Siren's Call [Beta Edition] Mirrodin Besieged at the beginning of eachSet: 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.