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

Enchant creature
When this Aura enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
Enchanted creature has ": Untap this creature."

: This creature gains flying until end of turn.

Target creature gets +1/+0 and gains lifelink and indestructible until end of turn. (Damage dealt by that creature also causes its controller to gain that much life, and it can't be destroyed by damage or effects that say "destroy.")

Exile target creature you control, then return that card to the battlefield under its owner's control. Create a 1/1 colorless Shapeshifter creature token with changeling. (It's every creature type.)

Pyroclasm deals 2 damage to each creature.

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

Return up to two target creature cards from your graveyard to your hand, then discard a card.

Create two 1/1 red Goblin creature tokens.

Lash Out deals 3 damage to target creature. Clash with an opponent. If you win, Lash Out deals 3 damage to that creature's controller. (Each clashing player reveals the top card of their library, then puts that card on their choice of the top or bottom. A player wins if their card had a greater mana value.)

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

Destroy target artifact. Smash to Smithereens deals 3 damage to that artifact's controller.

Destroy target nonartifact creature.

Return target creature to its owner's hand. Untap up to two lands.

Target creature gets -2/-0 until end of turn. Create a 2/2 black Zombie creature token with decayed. (It can't block. When it attacks, sacrifice it at end of combat.)
Draw a card.

Counter target red or green spell.

Sliver creatures you control have flying and haste.

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

At the beginning of each player's upkeep, that player chooses target player who controls more lands than they do and is their opponent. The first player may search their library for a basic land card, put that card onto the battlefield, then shuffle.

This creature enters with a +1/+1 counter on it.
, Remove a +1/+1 counter from this creature: All other creatures get -1/-1 until end of turn.

Choose one —
• Each opponent sacrifices a nontoken creature of their choice.
• Each opponent sacrifices a creature token of their choice.
• Each opponent sacrifices a planeswalker of their choice.

When this creature enters, it deals 1 damage to any target.

Cast this spell only before the combat damage step.
Target attacking or blocking creature gets +4/+0 until end of turn. Destroy that creature at the beginning of the next end step.

Landfall — Whenever a land you control enters, you may put a quest counter on this enchantment.
Remove three quest counters from this enchantment and sacrifice it: Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle.

Whenever an ability of equipped creature is activated, if it isn't a mana ability, copy that ability. You may choose new targets for the copy.
Equip

Creatures you control get +0/+1.
Sacrifice this enchantment: Return target creature to its owner's hand.

Fortified land has indestructible.
Whenever fortified land becomes tapped, target creature gets +1/+1 until end of turn.
Fortify (: Attach to target land you control. Fortify only as a sorcery. This card enters unattached and stays on the battlefield if the land leaves.)

Whenever an opponent discards a card, that player loses 2 life.

Prevent all damage that would be dealt to you by sources you don't control.
When a card is put into your graveyard from anywhere, sacrifice this enchantment.

, : Destroy target nonbasic land.

, : Target opponent discards a card. Then if that player has no cards in hand, flip this creature.

, Sacrifice this artifact: Add one mana of any color.
: This artifact becomes a Shapeshifter artifact creature with base power and toughness 3/3 until end of turn.

Buyback (You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)
Return target creature card from your graveyard to your hand.

Creatures you control have base power and toughness X/X until end of turn.

For Mirrodin! (When this Equipment enters, create a 2/2 red Rebel creature token, then attach this to it.)
Equipped creature gets +1/-1.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Flying
When this creature enters, return a permanent you control to its owner's hand.