Core Prowler [Mirrodin Besieged] Guilds of Ravnica Sacrifice a land: Return World

Sacrifice a land: Return World Breaker from your graveyard to your hand

Set: Mirrodin Besieged Type: Sorcery Rarity: Rare Cost: {X}{B}{B} Put X -1/-1 counters on each creature

Whenever you surveil

Enchanted land is a Swamp

Set: Magic 2014 Type: Legendary Planeswalker — Liliana Rarity: Mythic Cost: {2}{B}{B} +1: Search your library for a Swamp card

Core Prowler [Mirrodin Besieged] Guilds of Ravnica Sacrifice a land: Return WorldSet: Mirrodin Besieged Type: Artifact Creature Horror Rarity: Uncommon Cost: {4} Infect (This creature deals damage to creatures in the form of 1 1 counters and to players in the form of poison counters.) When Core Prowler dies, proliferate. (Choose any number of permanents and or players, then give each another counter of each kind already there.)