Creatures your opponents control get -1/-0.
Spellcharge 5

{1}, {T}: Target permanent you control becomes an artifact in addition to its other types until end of turn.
Sacrifice Welding Rig: Target artifact gains indestructible until end of turn.

Flash
Flying
When Whirring Inspector enters, target player reveals their hand. You may exile a nonland card from among them until your next turn. When you don't, exile up to one target nonland permanent that player controls until your next turn.

When Widowed Maiden enters, return target creature card from your graveyard to your hand.
Spellcharge 3

Flying, vigilance
{W}, {T}: Tap target creature.

[+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.

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.

Vigilance, haste
Whenever you cast a spell, if its mana value is greater than Xeia's power, put a number of +1/+1 counters on this creature equal to the difference and create a Treasure token.

Xiv, Replisparked has all activated and triggered abilities of permanent 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.

At the end of combat on your turn, untap all nonland permanents you control.
{W}{U}: Yingjun's Presence becomes a 3/2 Dragon creature with flying in addition to its other types.

Whenever this creature attacks, exile up to one target creature card with mana value equal to 1 plus this creature's mana value from your graveyard. This creature becomes a copy of that card, except it has this ability.

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

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.

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