: Add .
Threshold — This creature gets +3/+3 as long as there are seven or more cards in your graveyard.

Exile up to three target cards from a single graveyard.

, Mill a card: Add . (Activate only as an instant. To mill a card, put the top card of your library into your graveyard.)

Threshold — , , Exile two cards from your graveyard: Target player discards a card. Activate only as a sorcery and only if there are seven or more cards in your graveyard.

Target blocking creature gets +4/+4 until end of turn.
Draw a card.

Discard any number of cards. Counter target spell unless its controller pays for each card discarded this way.

Whenever a creature blocks, this enchantment deals 1 damage to that creature's controller.

Flying
, Sacrifice a land: Draw a card.

Target sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (Mana cost includes color.)
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Return up to X target creatures to their owners' hands, where X is one plus the number of cards named Aether Burst in all graveyards as you cast this spell.

, : Exile target card from a graveyard.
, Sacrifice this artifact: Exile target card from a graveyard.

Sacrifice this creature: Exile target card from a graveyard.

When this creature attacks or blocks, return it to its owner's hand at end of combat. (Return it only if it's on the battlefield.)

Threshold — This creature has flying as long as there are seven or more cards in your graveyard.

Gain control of target Aura that's attached to a permanent. Attach it to another permanent it can enchant.

Target player gains 4 life, then gains 4 life for each card named Life Burst in each graveyard.

When a player casts a spell, sacrifice this enchantment. If you do, each of that player's opponents draws three cards.

Target player discards X cards, where X is one plus the number of cards named Mind Burst in all graveyards.

Exile the top card of your library. You may put that card into your hand unless it has the same name as another card exiled this way. Repeat this process until you put a card into your hand or you exile two cards with the same name, whichever comes first.

Whenever a player casts a spell, that player may pay . If the player does, they draw a card.

Target creature gets +X/+X until end of turn, where X is 3 plus the number of cards named Muscle Burst in all graveyards.

Flame Burst deals X damage to any target, where X is 2 plus the number of cards named Flame Burst in all graveyards.

At the beginning of your upkeep, target opponent may exile a card from their graveyard. If that player doesn't, you may draw a card.

Sacrifice an enchantment: This creature gets +1/+1 until end of turn.
Discard a card: This creature gets +1/+1 until end of turn.

, Sacrifice this creature: It deals 2 damage to target creature.

Enchant creature
Enchanted creature gets +1/+1 and has protection from enchantments. This effect doesn't remove this Aura.
Sacrifice this Aura: Destroy target enchantment.

, Discard a card: This creature gains flying until end of turn.

At the beginning of your upkeep, you may put a +1/+1 counter on this creature.
Threshold — As long as there are seven or more cards in your graveyard, this creature has "At the beginning of your upkeep, you may put another +1/+1 counter on this creature."

Prevent the next 4 damage that would be dealt this turn to any number of targets, divided as you choose.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

: This enchantment becomes a 4/3 Centaur creature in addition to its other types until end of turn.

Tap an untapped Wizard you control: Counter target spell unless its controller pays .

Whenever a spell or ability an opponent controls destroys a noncreature permanent you control, you may destroy target permanent that opponent controls.

Discard a card, Sacrifice this creature: Add .

This creature can't attack or block alone.

Trample
Terravore's power and toughness are each equal to the number of land cards in all graveyards.

, Sacrifice a land: This enchantment deals 1 damage to each creature without flying.