msem-instigator

When Lifegorging Aberration enters, each opponent loses X life, where X is the number of Zombies you control. You gain life equal to the life lost this way.

Other Pirates and Rogues you control get +1/+0.
Whenever you attack with three or more Pirates and/or Rogues, tap target creature.

Whenever Anima Interrogator attacks, defending player reveals a card at random from their hand.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Cycling {2} ({2}, Discard this card: Draw a card.)

Desert Storm deals 6 damage to target creature.

Enchant creature you control
When Brawnsurge enters, enchanted creature deals damage equal to its power to up to one target creature an opponent controls.
Enchanted creature gets +1/+1 and has trample.

Whenever Sage of Reflections attacks, mill three cards, then choose a creature card milled this way. Create a token that's a copy of it that's tapped and attacking, except it has no mana cost.

Flying, vigilance
Prevent all damage Merciful Yuroda would deal to creatures.

Dawson's Negotiations deals 3 damage to any target. Players discard cards equal to the amount of excess damage dealt to a permanent they control this way.

First strike, haste
Other creatures you control with flash or haste have first strike.

First mate—Each nonland card in your starting deck has the same name as exactly one other card in your starting deck. (If this card outside the game is your chosen first mate, you may swap it with a card in your opening hand.)
Vigilance
Whenever you cast a spell with the same name as a card in your graveyard, draw a card.

Flying
When Ineptitude enters, untap target creature and gain control of it until end of turn. Put three stun counters on that creature. It gets +3/+3 and gains haste until end of turn.

Target creature gets +3/-1 until end of turn.
Metamorph {1}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

Activated abilities of cards in your hand cost up to {1} less to activate. This effect can't reduce the amount of mana an ability costs to activate to less than one mana.

Look at the top five cards of your library. You may reveal a land or enchantment card from among them and put it into your hand. Then put the rest on the bottom of your library in any order.

Look at the top three cards of your library. Exile one, put one into your hand, and put the rest on the bottom of your library. Wisdom Beyond Age deals damage to target creature or planeswalker equal to the exiled card's mana value.

Deathtouch
Whenever Addermark Eviscerator deals combat damage to a player, draw a card.
At the beginning of your end step, if Addermark Eviscerator didn't attack this turn, transform it.

{T}: Add {C}.
{1}, {T}, Sacrifice House of Forgotten Whispers: Draw a card.

As an additional cost to cast this spell, sacrifice a land.
Search your library for up to two basic land cards, put them onto the battlefield, then shuffle.

Whenever equipped creature attacks, each player loses 3 life.
Equip {2}

Sunrise Prairie enters tapped.
{T}: Add {W}.
You may untap Sunrise Prairie during each other player's untap step. Whenever you do, you lose 1 life.

Double strike, vigilance
At the beginning of combat on your turn, create X 1/1 red Dwarf creature tokens with haste, where X is the number of embattled nontoken creatures you control. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)

Enchant permanent
Whenever enchanted permanent becomes untapped, its controller gets a poison counter.

When Shambling Gutless enters, target player discards a card.

Exile up to three target cards from graveyards. (Then exile this card. You may cast the creature later from exile.)