Once each turn, when one or more cards leave your graveyard, you may have each opponent lose 1 life and you gain 1 life.
{2}{B}, Exile Writheling from your graveyard: Exile target card in a graveyard. You draw a card and you lose 1 life. Activate only as a sorcery.

Choose one —
• Wyrmshot deals 3 damage divided as you choose among one, two, or three targets.
• Wyrmshot deals 6 damage to target creature, planeswalker, or battle.

[+2]: Mill three cards. You gain 3 life.
[+1]: Return target land card from your graveyard to the battlefield. It becomes a 2/2 black Zombie creature in addition to its other types.
[–2]: Target opponent sacrifices a nonland permanent with mana value 3 or greater.
[–12]: You get an emblem with “Whenever a player sacrifices a permanent, you may draw a card.” Then each opponent sacrifices five permanents.

Whenever your Champion attacks, Xarr's Mockery gains indestructible until end of turn.

Integrate up to two target creatures with total toughness 6 or less.

At the beginning of combat on your turn, you may integrate another creature you control. If you don't, tap Xavvac, Corrupter Core.
Permanents you control with cards integrated onto them have lifelink and deathtouch.

Xiv, Replisparked has all abilities of creature and planeswalker cards integrated onto them.
[+2]: Target player discards a card. Integrate up to two cards from graveyards.
[+1]: Xiv becomes a 5/5 artifact creature with vigilance and indestructible until end of turn.
[–4]: Integrate target permanent.

Whenever Zakros Decree or another enchantment you control enters, target creature you control gets +1/+1 and gains lifelink until end of turn.

When Zakros General enters, choose one —
• You may return an enchantment you control to its owner's hand.
• Return target enchantment card from your graveyard to your hand.

Menace
Whenever you sacrifice a permanent, exile the top card of your library. Until the end of your turn, you may play that card.

{T}: Add {C}{C}.
Whenever you cast a Kraken, Leviathan, Octopus, or Serpent spell, draw a card.

Whenever you cast a spell that targets Zenith Marshal, create a 1/1 white Human creature token. If Zenith Marshal is attacking, that token enters tapped and attacking.
As long as Zenith Marshal is attacking, other creatures you control get +1/+0.

Whenever a counter is put on another creature you control, you may put a counter of the same kind on Zeno. Then if there are no other counters of that kind on Zeno, draw a card. Do this only once each turn.

Flying, ward {1}
Zhovala, Silver Monarch gets +1/+1 for each other Advisor you control and each Advisor card you own in exile.
Whenever another Advisor you control dies, exile it unless an opponent pays {2}. You may cast that card as long as it remains exiled.

Flying
Whenever you draw your second card each turn, tap target nonland permanent.

Whenever a creature you control becomes a Rebel, Zolo's Right Horn deals 2 damage to each opponent.
{3}{R}: Zolo's Right Horn dares 5.

Trample
Rebels you control have trample.
{X}{G}: Another target creature you control dares twice X. Activate only as a sorcery.

Ward—Pay 2 life.
Whenever Zygos attacks, bless target legendary creature you control.

Flash
{2}{B}, Discard Zyxthax Apex: Each opponent loses 3 life and you gain 3 life.
{6}{B}{B}: Return Zyxthax Apex from your graveyard to the battlefield tapped with a finality counter on it.