msem-instigator

Target player reveals their hand. You choose a nonland card from it. That player discards that card. You lose 1 life.
Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Deathtouch
Sacrifice a creature: Target player mills two cards.

Choose one —
• Exile target player's graveyard.
• Target player sacrifices a creature.

Whenever a nontoken creature you control dies, create a 1/1 black Worm creature token.
Sacrifice Fertile Grave: Create a 1/1 black Worm creature token.

When Fatethief dies, put the bottom card of your library into your hand.
Revive {2}{B}{B} ({2}{B}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

When Damned Deal enters, you draw a card and you lose 1 life.
{B}, Sacrifice Damned Deal: You draw a card and you lose 1 life.

Lifelink
Whenever you sacrifice a nonland permanent, you may pay {1}. If you do, you draw a card and you lose 1 life.

When Chigau, the Red Market enters, draw a card, then choose a creature card name.
Once each turn, you may cast a creature spell with the chosen name from your graveyard.

Create a 5/3 black Horror creature token.
Flashback {1}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

As an additional cost to cast this spell, exile two permanent cards from your graveyard.
You may cast Adiran Survivors from your graveyard.

Wanderlust — This spell has flash as long as you control four or more differently named lands.
Draw four cards.

This spell costs {1} less to cast for each instant and sorcery card in your graveyard.
When Vedalken Reshaper enters, return target instant or sorcery card from your graveyard to your hand.

Flash
When Seabreen Nullmage enters, counter target activated or triggered ability. (A triggered ability uses the words “when,” “whenever,” or “at”. Mana abilities can't be targeted.)

Draw a card, then draw cards equal to the number of cards named Sea Cache in your graveyard.

Return target creature to its owner's hand.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, draw a card.

Whenever you cast an instant or sorcery spell, look at the bottom card of your library. You may manifest it. If you don't, put it into your hand. (To manifest a card, put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

Each player shuffles their hand and graveyard into their library. Then each player draws seven cards. If you didn't control a blue legendary creature or planeswalker as you cast this spell, discard three cards. Exile Entelan Erasure.

Create a 1/1 blue Otter creature token with “Whenever this creature deals combat damage to a player, draw a card.”
Wanderlust — If you control four or more differently named lands, create two of those tokens instead.

Whenever Arcane Duelist becomes tapped, target instant or sorcery card with mana value 1 in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

Target player mills X cards, where X is the number of cards named Against the Waves in your graveyard. Draw a card, then conjure three cards named Against the Waves and shuffle them into your main library.

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Whenever you cast a noncreature spell, creatures you control gain lifelink until end of turn.

Strident Retainer's power and toughness are each equal to the number of creatures you control.
Art of war — At the beginning of your end step, if Strident Retainer dealt damage to an opponent this turn, create a 1/1 colorless Samurai creature token.

If you would lose the game, instead sacrifice a storied permanent. If you do and your life total is less than 1, it becomes 1.

Primal—{W}, Exile a creature you control. (During your turn, you may cast this spell by paying {W} and exiling a creature you control instead of playing a land.)
When Planar Eviction enters, exile another target nonland permanent until Planar Eviction leaves the battlefield.

Enchant creature
When Photon Barricade enters, draw a card.
Enchanted creature gets +1/+1 and can't attack.