Exile target artifact or enchantment.

Changeling
When this creature enters, create a 2/2 colorless Shapeshifter creature token with changeling.

If you would draw a card during your draw step, instead you may skip that draw. If you do, until your next turn, you can't be attacked except by creatures with flying and/or islandwalk.

Exile target permanent with mana value 1.

When this enchantment enters, exile target creature or enchantment an opponent controls until this enchantment leaves the battlefield. (That permanent returns under its owner's control.)

Choose one —
• All creatures get -2/-0 until end of turn.
• Tap target creature.
• Prevent the next 1 damage that would be dealt to any target this turn.

Flying
When this creature dies, return it to the battlefield under its owner's control at the beginning of the next end step and you skip your next draw step.
: Exile this creature.

When this creature enters, tap all nonwhite creatures.
Suspend 5 —

Protection from red
Creatures named Ivory Guardians get +1/+1 as long as an opponent controls a nontoken red permanent.

You have shroud.

When this enchantment enters, exile target nonland permanent an opponent controls until this enchantment leaves the battlefield.
Your opponents can't cast spells with the same name as the exiled card.

Cast this spell only after combat.
Gain control of target nonartifact, nonblack creature that attacked you this turn and put a -1/-0 counter on it.

Flying
Whenever this creature or another creature you control with flying dies, return another target creature card with lesser mana value from your graveyard to the battlefield.

Whenever another artifact you control enters, put a +1/+1 counter on Jackknight. If that artifact is a Contraption, Jackknight gains lifelink until end of turn.

Return target permanent card in an opponent's graveyard to the battlefield under their control. When that permanent enters, return up to one target permanent card with equal or lesser mana value from your graveyard to the battlefield.

, : Target creature can't block this turn.

Whenever Jareth blocks, it gets +7/+7 until end of turn.
: Jareth gains protection from the color of your choice until end of turn.

, : Reveal any number of white cards in your hand. You gain 2 life for each card revealed this way.

Double strike
Toxic 1

First strike
: Attacking creatures you control get +X/+X until end of turn, where X is the number of attacking creatures.

Vigilance
When this creature enters, you gain 4 life.

Your opponents can't cast spells during your turn.
: Transform Jennifer Walters. Activate only as a sorcery.

When Jennika enters, create a 2/2 red Mutant creature token.
Plainscycling

When this creature enters, put a +1/+1 counter on target creature.

When you cast this spell, create a 1/1 white Athlete creature token.
Rebound

Flash
Defender
When this creature enters, you may return another target creature you control to its owner's hand.

Whenever Jet attacks, look at the top five cards of your library. You may put a creature card with mana value 3 or less from among them onto the battlefield tapped and attacking. Put the rest on the bottom of your library in a random order.