The next time a source of your choice would deal damage to you this turn, prevent that damage. If damage is prevented this way, Deflecting Palm deals that much damage to that source's controller.

Grimgrin enters tapped and doesn't untap during your untap step.
Sacrifice another creature: Untap Grimgrin and put a +1/+1 counter on it.
Whenever Grimgrin attacks, destroy target creature defending player controls, then put a +1/+1 counter on Grimgrin.

Whenever this creature or another Elemental you control enters, look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you don't put the card onto the battlefield, put it into your hand.

Jenova Cells — Whenever Sephiroth attacks, you may put a cell counter on target creature. Until end of turn, each modified creature you control has base power and toughness 7/5. (Equipment, Auras you control, and counters are modifications.)
The Reunion — , Sacrifice a modified creature: Return this card from your graveyard to the battlefield tapped.

Spell commander (This card can be your commander. In Limited, it can partner like other monocolored legends.)
Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.

Enchant creature
As long as enchanted creature is blue, it gets +1/+1 and has "Whenever this creature deals damage to an opponent, draw a card."
As long as enchanted creature is black, it gets +1/+1 and has "Whenever this creature deals damage to an opponent, that player discards a card."

Destroy all creatures.

Creatures you control have trample.
: This artifact becomes a 4/4 Juggernaut artifact creature until end of turn.

Choose target creature you control. Each other creature becomes a copy of that creature until end of turn, except it isn't legendary.

Sacrifice a creature: Regenerate target creature.

Whenever Ayara or another black creature you control enters, each opponent loses 1 life and you gain 1 life.
, Sacrifice another black creature: Draw a card.

Kicker
Each opponent mills eight cards. If this spell was kicked, instead each opponent mills half their library, rounded up.

When this creature enters or dies, mill three cards. (Put the top three cards of your library into your graveyard.)

This creature can't block.
You may cast this card from your graveyard as long as you control a Zombie.

Whenever you gain life, you may pay , where X is less than or equal to the amount of life you gained. If you do, draw X cards.

At the beginning of each player's draw step, that player draws two additional cards.

Xantcha enters under the control of an opponent of your choice.
Xantcha attacks each combat if able and can't attack its owner or planeswalkers its owner controls.
: Xantcha's controller loses 2 life and you draw a card. Any player may activate this ability.

Flash (You may cast this spell any time you could cast an instant.)
When this creature enters, choose one —
• Untap target permanent you control.
• Tap target permanent an opponent controls.

, : Put a divinity counter on target permanent other than That Which Was Taken.
Each permanent with a divinity counter on it has indestructible.

Afflict 3 (Whenever this creature becomes blocked, defending player loses 3 life.)
At the beginning of each of your postcombat main phases, add for each 1 life your opponents have lost this turn.