msem-instigator

Whenever one or more other nontoken creatures die, create a Food token. (It's an artifact with “{2}, {T}, Sacrifice this artifact: You gain 3 life.”)
Whenever you sacrifice a Food, create a 1/1 black Bat creature token with flying.

All creatures get -2/-2 until end of turn. Remove two loyalty counters from each planeswalker.

Each player loses 3 life, then discards a card, then sacrifices a creature, an enchantment, a land, a planeswalker and a token. Then exile all graveyards.

Menace, haste
Whenever Tiger of the Drums attacks, choose one —
• Exile target opponent's graveyard.
• You draw a card and lose 1 life.
• Torment each opponent. (They lose 3 life unless they discard a card or sacrifice a nonland permanent.)

Choose two —
• Scry 3, then you may mill up to three cards.
• Each opponent loses 3 life.
• You draw a card and you lose 1 life.
• Return a creature card from your graveyard to your hand.

As an additional cost to cast this spell, torment yourself. (You lose 3 life unless you discard a card or sacrifice a nonland permanent.)
Destroy target creature.

Flying, lifelink
Whenever you gain life, you may have target creature get -X/-X until end of turn, where X is the amount of life you gained.

Flying
Whenever one or more other creatures die for the first time each turn, journey. (To journey, exile the top card of your library face up. Whenever a creature you control deals combat damage to an opponent, put a journeyed card you own into your hand.)

Lifelink
Whenever you gain life, each opponent loses 1 life.

Deception {B} ({B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Lifelink
{1}{B}: Nimunotian Shadow gets +1/+1 until end of turn.

Each other Okus planeswalker you control enters with two additional loyalty counters on it.
[–2]: Each opponent discards a card and loses 2 life.

Lifelink
Frenzied Watchkeeper enters with six -1/-1 counters on it.
At the beginning of each end step, if an opponent lost life this turn, remove a -1/-1 counter from Frenzied Watchkeeper.

When Forbidden Shiangshi Arts enters, each player mills three cards.
{2}{B}: Exile target creature card from a graveyard. Create a tapped token that's a copy of that card, except it has “When this creature deals damage, sacrifice it.”

Faux, Who Lives for the Hunt enters as a copy of a creature card in your graveyard except it's legendary and has changeling and “When this creature dies, if it didn't have a bounty counter on it, return it to the battlefield with a bounty counter.” (It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)

Primal {B}{B} (During your turn, you may cast this spell for {B}{B} instead of playing a land.)
Search your library for a card and put that card into your hand, then shuffle. Exile Deceitful Tutor.

Destroy four target creatures.

Return target creature card from your graveyard to the battlefield. If it's your combat phase, that creature enters tapped and attacking.

Sacrifice a creature: Surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)

Return all creature and planeswalker cards from your graveyard to the battlefield.

Mill four cards, then you may return a creature or planeswalker card from your graveyard to your hand.
As long as Beneath the Zhedina is in your graveyard, other cards in your graveyard can't be the target of spells or abilities your opponents control.

Once during each of your turns, when a card is put into a graveyard from anywhere, you may cast it. You may spend mana of any color to cast that spell.
When Arroyo, Infinitely Branching is put into your graveyard from anywhere, you may cast it.

I, II — Return target creature card from your graveyard to your hand.
Discovery — {2}{B}, Sacrifice a creature: Each opponent loses 2 life and you gain 2 life.

Surveil 1, then draw a card. (To surveil 1, look at the top card of your library. You may put that card into your graveyard.)
Create a tapped Treasure token.

Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Return each nonland permanent your opponents control to its owner's hand.

When Titan of Lake Vasil enters, untap up to four target permanents.
{3}{U}: Draw a card.