Siren's Call [Alpha Edition] ELE000 you may have Valakut

you may have Valakut

Set: Crucible of War Edition: 1st Edition Finish: Cold Foil Type: Weapon Subtype: Dagger (1H) Rarity: Rare Class: Ninja Power: 2 Once per Turn Action - [1 Resource]: Attack

Set: Battle for Zendikar Prerelease Promos Type: Creature — Eldrazi Rarity: Rare Cost: {10} When you cast this spell

You skip your next turn

Siren's Call [Alpha Edition] ELE000 you may have ValakutSet: 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.