Altar of Dementia [Tempest]Set: Tempest Type: Artifact Rarity: Rare Cost: {2} Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power. "It is not that you will go mad. It is that you will beg for madness." Volrath

that permanent's controller mills a card

before leading an army against the Shu

Set: Portal Three Kingdoms Type: Sorcery Rarity: Common Cost: {1}{G} Search your library for a Forest card and put that card onto the battlefield

—Arab proverb

Set: Exodus Type: Instant Rarity: Rare Cost: {3}{B}{B} As an additional cost to cast this spell

I can do no less

Set: Beta Edition Type: Land — Island Mountain Rarity: Rare ({T}: Add {U} or {R}

Sacrifice a creature: Add {B}{B}

it deals double that damage to that permanent or player instead

it gets +3/+3 until end of turn for each creature blocking it beyond the first

Set: Ice Age Type: Sorcery Rarity: Rare Cost: {R}{R}{R} Flip a coin

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