Siren's Call [Beta Edition] Legendary Planeswalker Set: San Diego Comic-Con 2015

Set: San Diego Comic-Con 2015 Type: Legendary Creature — Elf Scout Rarity: Mythic Cost: {2}{G} When Nissa

Set: Beta Edition Type: Instant Rarity: Uncommon Cost: {U} Cast this spell only during an opponent's turn

then sacrifices the rest

" —The Underworld Cookbook

When you control no lands

Siren's Call [Beta Edition] Legendary Planeswalker Set: San Diego Comic-Con 2015Set: 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.