msem-instigator

Whenever an artifact enters or leaves the battlefield under your control, you gain 1 life.

First mate—Each nonland card in your starting deck has “destroy,” “die,” “graveyard,” and/or “mill” in its printed rules text. (If this card outside the game is your chosen first mate, you may swap it with a card in your opening hand.)
Deathtouch
When Marisa enters, if it was cast, you may put target permanent card from a graveyard onto the battlefield under your control.

Choose X. You may choose the same mode more than once.
• Each opponent loses 3 life and you gain 3 life.
• Each opponent sacrifices a nonland permanent and you create a Treasure token.
• Each opponent discards a card and you draw a card.

Substack Ports enters tapped.
{T}: Add {U} or {B}.
{U}{B}, {T}, Sacrifice Substack Ports: Conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)

Flying
{3}{U}, Sacrifice Nimbus Fae: Put target creature on top of its owner's library.

Masked Impersonator can't be blocked.
Art of war — At the beginning of your end step, if Masked Impersonator dealt damage to an opponent this turn, you may have it become a copy of target creature you control except it has this ability.

Augury Hydra enters with X +1/+1 counters on it.
When Augury Hydra enters, scry Y, where Y is its power, then draw Y cards.

Destroy target creature that was dealt damage this turn, then create a 3/2 black Mutant Horror creature token.

Flash
Whenever Operative POSH attacks or you cast a green or red spell, exile up to one target nontoken permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step.

Trample
At the beginning of each combat, you may have Grisly Offering deal 3 damage to target creature you control. If you do, Grisly Offering gets +3/+0 until end of turn.

{T}, Pay 1 life: Add {G} or {W}.
{2}, {T}, Sacrifice Provincial Hamlet and another permanent: Draw a card. Activate only during your turn.

Trample
Whenever Ruinous Glutton deals combat damage to a player, destroy target artifact or enchantment that player controls.

Sabotage — Whenever an opponent or permanent an opponent controls becomes the target of a spell you control, Iken Troubleshooter deals 2 damage to each opponent.

Trample, haste
When Rejuvenating Elemental enters, remove up to X -1/-1 counters from among creatures you control. Rejuvenating Elemental gets +1/+1 until end of turn for each counter removed this way.

When Wavebreaker enters, add two mana of any one color. You can't spend this mana to cast spells.

Lifelink
Whenever a creature with power less than Kiri, Cloudwalker's power you control enters, you may pay {W}. If you do, you gain 2 life and draw a card.

Equipped creature has “{T}: This creature deals damage equal to its power to any target.”
Equip {4}

Whenever Ujuraq, Elder Watcher enters or attacks, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)
Ujuraq gets +3/+3 and has trample as long as there are eight or more cards in your graveyard.

When The Clocktower Project enters, create a tapped colorless Powercell artifact token with “{T}: Add {C}.”
Tap seven untapped artifacts you control: Draw three cards.

If one or more counters would be put on a permanent you control, you may have that many counters plus one or that many counters minus one put on that permanent instead.

{R}, Sacrifice Firebelly Toad: It deals 3 damage to target player or planeswalker.

Once during each of your turns, you may cast an instant, sorcery, or enchantment spell from your graveyard that targets a creature you control.

Whenever equipped creature attacks, exile the top card of your library. Equipped creature gets +X/+0 until end of turn, where X is the mana value of that card. Until end of turn, you may play that card.
Equip {2}

Flash
Enchant creature
Enchanted creature gets +2/+2.

Combined Generator can't be blocked except by three or more creatures.