Sacrifice a creature: Target player mills cards equal to the sacrificed creature's power.

{T}, Sacrifice a creature: This artifact deals 1 damage to any target. Whenever a creature enters, you may untap this artifact.

{3}, Sacrifice a creature: Draw a card.

Equipped creature gets +4/+2. Equip—Sacrifice a creature.

Equipped creature gets +3/+2. Whenever this Equipment becomes unattached from a permanent, sacrifice that permanent. Equip {0} ({0}: Attach to target creature you control. Equip only as a sorcery.)

Sacrifice a creature: Put a charge counter on Spawning Pit. {1}, Remove two charge counters from Spawning Pit: Create a 2/2 colorless Spawn artifact creature token.

Forests you control are 1/1 green Elf creatures that are still lands. {1}{G}, Sacrifice an Elf: Target creature gets +3/+3 until end of turn.

{G}, Sacrifice a Forest: This creature gets +2/+2 until end of turn.

Morph {0} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, it becomes the creature type of your choice. (This effect lasts indefinitely.)

Sacrifice a Forest: Regenerate this creature.

Sacrifice this creature: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Devour 1 (As this creature enters, you may sacrifice any number of creatures. It enters with that many +1/+1 counters on it.) When this creature enters, draw a card for each creature it devoured.

Reach (This creature can block creatures with flying.) Sacrifice a land: This creature deals 1 damage to each creature with flying.

Morph—Reveal a green card in your hand. (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.) When this creature is turned face up, target creature gains trample until end of turn.

Sacrifice a Forest: Target attacking creature gets -3/-0 until end of turn.

Whenever a creature dies, that creature's controller may draw a card.

Enchant creature Sacrifice a Forest: Regenerate enchanted creature. When this Aura is put into a graveyard from the battlefield, return it to its owner's hand.

All Forests and all Saprolings are 1/1 green Saproling creatures and Forest lands in addition to their other types. (They're affected by summoning sickness.)

All Forests are 1/1 creatures that are still lands.

All lands are 2/2 creatures that are still lands.

As this enchantment enters, sacrifice all lands you control. Lands you control have "{T}: Add two mana of any one color."

{1}, Sacrifice a creature: Search your library for a land card with a basic land type, put it onto the battlefield tapped, then shuffle.