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.")

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.)

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

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.

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

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.

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.

, 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.

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.

Bushido 2 (Whenever this creature blocks or becomes blocked, it gets +2/+2 until end of turn.)

As an additional cost to cast this spell, sacrifice an artifact or creature.
Draw two cards and create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

When this creature enters, you may goad target creature. (Until your next turn, that creature attacks each combat if able and attacks a player other than you if able.)

Put a -1/-1 counter on target creature. Blur of Blades deals 2 damage to that creature's controller.

Target creature gains double strike until end of turn.
Ferocious — That creature also gains trample until end of turn if you control a creature with power 4 or greater.

Prevent all damage one or two target creatures would deal this turn.

Shadow (This creature can block or be blocked by only creatures with shadow.)
This creature can't be blocked by white creatures.

When this creature enters, you gain 4 life.

Defender
: This creature deals 1 damage to each opponent.
Whenever you cast an instant or sorcery spell, untap this creature.

, Exile two creature cards from a single graveyard: Create a 1/1 green Saproling creature token.

This creature can't attack or block alone.

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When this creature enters, return target creature an opponent controls to its owner's hand.

Flash (You may cast this spell any time you could cast an instant.)
When this enchantment enters, scry 2, then draw a card.
, Sacrifice this enchantment: Scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

, Sacrifice a creature: Each opponent loses 1 life and you gain 1 life.

Destroy target creature with power 2 or less.

Target creature gets +2/+2 and gains trample until end of turn.
Madness (If you discard this card, discard it into exile. When you do, cast it for its madness cost or put it into your graveyard.)