Siren's Call [Beta Edition] Pioneer You may have that player

You may have that player lose that much life

you may look at the top X cards of your library

If any creatures with banding you control are blocking or being blocked by a creature

At the beginning of the end step

If you sacrifice an Island this way

Siren's Call [Beta Edition] Pioneer You may have that playerSet: 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.