Roil Elemental [Zendikar] Snake Set: HarperPrism Book Promos Type:

Set: HarperPrism Book Promos Type: Artifact Rarity: Rare Cost: {0} At the beginning of your upkeep

then exile any number of them and put the rest back on top of your library in any order

Set: Gateway 2007 Type: Creature — Elf Druid Rarity: Rare Cost: {G} {T}: Add {G}

Set: Commander 2016 Type: Enchantment — Aura Curse Rarity: Rare Cost: {B} Enchant player

If both targets are still legal as this ability resolves

Roil Elemental [Zendikar] Snake Set: HarperPrism Book Promos Type:Set: Zendikar Type: Creature Elemental Rarity: Rare Cost: {3}{U}{U}{U} Flying Landfall Whenever a land enters the battlefield under your control, you may gain control of target creature for as long as you control Roil Elemental. A vortex that devours everythingeven the souls of the living.