Enchant creature
This Aura enters with X scream counters on it.
Enchanted creature gets +1/+0 for each scream counter on this Aura.

Whenever a permanent you control enters tapped, untap it.

Target spell or permanent becomes colorless.

Counter target spell unless its controller pays . If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Return target creature card with mana value 2 or less from your graveyard to the battlefield.

Discard your hand.

You gain 2 life. Target creature gets +X/+X until end of turn, where X is the amount of life you gained this turn.

Whenever an opponent plays a land, you may put a land card from your hand onto the battlefield.

Target creature gets +2/+2 until end of turn.
Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)

Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 1-2
3/3
LEVEL 3+
5/5
This creature can't be blocked except by black creatures.

Search your library for a card, then shuffle and put that card on top. You lose 2 life.

Create a 0/3 blue Crab creature token.
Investigate. (Create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")

Sacrifice this creature: Add .

Create a 1/1 green Squirrel creature token.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When this creature dies, create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")
Encore (, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)

Prevent the next 3 damage that would be dealt to any target this turn by a source of your choice. You gain 3 life.

Target creature has base power and toughness 1/1 until end of turn.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)
: Add , , or .

Whenever an opponent draws a card, if you control a red permanent, you may have this creature deal 1 damage to that player.

This creature can't block.

Counter target spell unless its controller pays . If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Trample
This creature gets +1/+0 for each oil counter on it.
When this creature enters and whenever another creature or artifact you control is put into a graveyard from the battlefield, put an oil counter on this creature.

Forestwalk (This creature can't be blocked as long as defending player controls a Forest.)

Menace (This creature can't be blocked except by two or more creatures.)
Discard a card, Sacrifice this creature: Draw a card.

Activated abilities of creatures you control cost less to activate. This effect can't reduce the mana in that cost to less than one mana.

Equipped creature gets +0/+1 and has ward . (Whenever equipped creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)
Equip . Activate only once each turn.

As an additional cost to cast this spell, sacrifice a land.
Search your library for a land card, put that card onto the battlefield, then shuffle.

Sacrifice this creature: Target creature you control gains protection from the color of your choice until end of turn.

: Shuffle your library.
: Look at the top X cards of your library, then put them back in any order.

Whenever a creature you control enters, you gain 1 life.

Until end of turn, target creature you control becomes a green Wurm with base power and toughness 6/4.
Overload (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

When this creature enters, pay (two energy counters). If you can't, return this creature to its owner's hand and you get .

Whenever this creature is dealt damage, it deals that much damage to you.

Destroy target attacking or blocking creature with power 2 or less.

Battle cry (Whenever this creature attacks, each other attacking creature gets +1/+0 until end of turn.)
This creature can't be blocked except by creatures with flying or reach.

Equipped creature has deathtouch and lifelink. (Any amount of damage it deals to a creature is enough to destroy it. Damage dealt by this creature also causes you to gain that much life.)
Equip (: Attach to target creature you control. Equip only as a sorcery.)