You may look at the top card of your library any time. You may play lands and cast spells from the top of your library. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost. {T}, Sacrifice ten nonland permanents: Each opponent loses 10 life.

Sacrifice a creature: Add one mana of any color.

Flying Whenever you gain life, each opponent loses 1 life.

When Demon's Disciple enters the battlefield, each player sacrifices a creature or planeswalker.

Whenever you sacrifice another creature, you gain 1 life and scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.) {1}, Sacrifice another creature: Fleshtaker gets +2/+2 until end of turn.

Whenever one or more creatures you control deal combat damage to a player, create two Treasure tokens. {B}, Sacrifice X Treasures: Target creature gets -X/-X until end of turn. Activate only as a sorcery.

Whenever you gain life, each opponent loses 1 life.

When Merciless Executioner enters the battlefield, each player sacrifices a creature.

Whenever a source an opponent controls deals damage to you, that player sacrifices a permanent.

Whenever one or more other creatures die, draw a card. This ability triggers only once each turn.

When Ruthless Technomancer enters the battlefield, you may sacrifice another creature you control. If you do, create a number of Treasure tokens equal to that creature's power. {2}{B}, Sacrifice X artifacts: Return target creature card with power X or less from your graveyard to the battlefield. X can't be 0.

Sacrifice Selfless Savior: Another target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Flying Sacrifice Selfless Spirit: Creatures you control gain indestructible until end of turn.

Devoid (This card has no color.) Flying At the beginning of your upkeep, sacrifice a creature. Whenever you sacrifice a creature, draw a card.

Whenever an opponent casts a spell, that player sacrifices a permanent unless they pay {1}.

Menace Whenever you gain life, you may pay {B}. If you do, return target creature card from your graveyard to your hand.

Flash When Werefox Bodyguard enters the battlefield, exile up to one other target non-Fox creature until Werefox Bodyguard leaves the battlefield. {1}{W}, Sacrifice Werefox Bodyguard: You gain 2 life.

Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) Artifacts and creatures your opponents control enter the battlefield tapped.

Flash Whenever a creature you control dies, each opponent sacrifices a creature.

Target player sacrifices an attacking creature. You create X 1/1 white Soldier creature tokens, where X is that creature's toughness.

Each player chooses from among the permanents they control an artifact, a creature, an enchantment, and a land, then sacrifices the rest.

Each player sacrifices a creature.