When this creature enters, choose one —
• Create a 1/1 white Bird creature token with flying.
• Return another target nonland permanent to its owner's hand.
• Draw a card.

Flying
When this creature dies, it deals 3 damage to each creature and each player.
: Return this card from your graveyard to your hand.

Hexproof
This land enters tapped. As it enters, choose a color.
: Add one mana of the chosen color.

Draw two cards. Then you may discard two cards. When you do, Ill-Timed Explosion deals X damage to each creature, where X is the greatest mana value among cards discarded this way.

As this enchantment enters, choose a creature type.
Each creature you control is the chosen type in addition to its other types.

As an additional cost to cast this spell, behold an Elf and exile it. (Exile an Elf you control or an Elf card from your hand.)
Whenever you cast a creature spell, draw a card.
When this creature leaves the battlefield, return the exiled card to its owner's hand.

Whenever this creature or another Ally you control enters, you may put a +1/+1 counter on each Ally creature you control.

: Target noncreature artifact becomes an artifact creature with power and toughness each equal to its mana value until end of turn.
: Target artifact creature gains deathtouch and lifelink until end of turn.

Flash
Enchant creature you control
Enchanted creature gets +1/+1 and has "Whenever this creature deals combat damage to a player, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost." (You may cast that card from your graveyard for its flashback cost. Then exile it.)

This creature can't block.
When this creature dies, create X 1/1 black Rat creature tokens with "This token can't block," where X is the amount of damage dealt to it this turn.

Level up (: Put a level counter on this. Level up only as a sorcery.)
LEVEL 2-3
2/4
, : Copy target instant or sorcery spell. You may choose new targets for the copy.
LEVEL 4+
2/5
, : Copy target instant or sorcery spell twice. You may choose new targets for the copies.

Whenever you gain life, you may pay . If you do, draw a card.
: Create a 1/1 white Soldier creature token with lifelink.

This land enters tapped with two charge counters on it.
: Add .
, Remove a charge counter from this land: Add one mana of any color.

This land enters tapped.
: Add or .
: This land becomes a 3/4 red and green Dinosaur creature until end of turn. It's still a land.
Whenever this land attacks, another target attacking creature gets +2/+0 until end of turn. Untap that creature.

This land enters tapped.
When this land enters, scry 1. (Look at the top card of your library. You may put that card on the bottom.)
: Add or .

When this creature enters, you may have target opponent sacrifice a creature of their choice.

You may have this land enter tapped as a copy of any land card in a graveyard, except it's a Cave in addition to its other types.
: Add .

Destroy target artifact with mana value X. It can't be regenerated. Detonate deals X damage to that artifact's controller.

Destroy target creature. If a creature card is put into a graveyard this way, return it to the battlefield under your control. Sacrifice it at the beginning of your next end step.

Demonstrate (When you cast this spell, you may copy it. If you do, choose an opponent to also copy it. Players may choose new targets for their copies.)
Create a token that's a copy of target permanent you control.