Touch of Darkness [Legends] Shards of Alara put it on the bottom

put it on the bottom of your library

"The scythe of time or my blade at your throat—the choice is yours

Set: Battle for Zendikar Prerelease Promos Type: Creature — Eldrazi Rarity: Rare Cost: {6} When you cast this spell

Sacrifice a creature: You gain life equal to the sacrificed creature's toughness

if there are no Zombies on the battlefield

Touch of Darkness [Legends] Shards of Alara put it on the bottomSet: Legends Type: Instant Rarity: Uncommon Cost: {B} One or more target creatures become black until end of turn. "Black spirits and white, red spirits and gray, Mingle, mingle, mingle, you that mingle may." Thomas Middleton, The Witch