msem-instigator

Sabotage — Whenever an opponent or permanent an opponent controls becomes the target of a spell you control, put a +1/+1 counter on Mirrorcast Battlemage.
Remove three +1/+1 counters from Mirrorcast Battlemage: Copy target instant or sorcery spell you control. You may choose new targets for the copy. Activate only once each turn.

Mirrorgate enters the battlefield tapped.
When Mirrorgate enters the battlefield, if it isn't a copy, choose a nonbasic land card name other than Mirrorgate.
Lands with the chosen name are copies of Mirrorgate.
{T}: Add one mana of any type that a land you control could produce.

When Monstrous Hunter enters the battlefield, destroy up to one target creature.
At the beginning of each end step, if a creature died this turn, you draw a card and you lose 1 life.

Lifelink
Whenever Morning's Warden becomes the target of a spell or ability an opponent controls, exile target creature that player controls.

Vigilance, reach, trample

[+1]: Up to one target creature gets +2/+0 until end of turn. Each player loses 1 life.
[–X]: Return target creature card with mana value X from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield.
[–7]: For each 1 life target player has less than their starting life total, create a 1/1 black Bird creature token with flying and deathtouch.

Draw two cards.
Crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)

Untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase. For each planeswalker you control, you may activate its loyalty abilities an additional time this turn.

As Nebula of Empty Gold enters the battlefield, choose two or more colors. You lose life equal to the number of colors chosen this way.
{T}: Add one mana of any of the chosen colors.

Exile target permanent you control, then return that card to the battlefield under your control.

Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
Add one mana of any color.

Return target nonland permanent to its owner's hand.
Exile target nonland permanent you control, then return it to the battlefield under your control.

Search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.
Reconstruct {X}{G}{G}{G} (You may cast this from your graveyard for its reconstruct cost reduced by the mana value of a permanent you sacrifice as you cast it this way. Then exile this.)
You can't sacrifice creatures or lands to pay Never Enough's reconstruct cost.

As New Divide enters the battlefield, you may pay 2 life. If you don't, it enters the battlefield tapped.
{T}, Sacrifice New Divide: Search your library for a basic land card, put it onto the battlefield, then shuffle.

Once each turn, when another creature dies, you may crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)
Whenever an artifact you control dies, Nihilistic Shock Trooper deals 1 damage to each opponent.

Flash
{1}{W}: Return Nimble Explorer to its owner's hand.

At the beginning of combat on your turn, you may attach target Equipment you control to Nina, Master of Arms.
Whenever Nina attacks, the next artifact spell you cast this turn costs {R/W}{R/W} less to cast. (This can reduce the amount of generic mana you pay.)

Flash
When Nixie's Edict enters the battlefield, tap up to two target creatures.
{2}{W}, Sacrifice Nixie's Edict: Put up to one target creature into its owner's library second from the top. Activate only as a sorcery.

Destroy target monocolored permanent.
Reconstruct {4}{B}{G} (You may cast this from your graveyard for its reconstruct cost reduced by the mana value of a permanent you sacrifice as you cast it this way. Then exile this.)
You can only sacrifice permanents that share a color with No Good Deed Goes Unpunished to pay its reconstruct cost.

Put target permanent card with mana value 3 or less from a graveyard onto the battlefield under your control.
Leitmotif (If you cast this spell from your hand, exile it as it resolves. When you next cast a spell that shares a color with this card, you may cast this from exile without paying its mana cost.)

Flying
Whenever Novaheart Dragon enters the battlefield or attacks, you may take an extra turn after this one. If you do, you lose the game at the beginning of that turn's end step.

Flying
When Novaheart Guardian enters the battlefield, it deals 4 damage to any target.
Whenever a creature or planeswalker dies, put a +1/+1 counter on Novaheart Guardian.

Flash
Whenever Nsimi's Scrambler deals combat damage to a player, look at that player's hand. You may choose a nonland card from it. If you do, that player reveals the chosen card, puts it on the bottom of their library, then draws a card.

Trample
Whenever you attack with another creature with power 4 or greater, put a +1/+1 counter on OH-14 Diamond.

Menace
When OM-6 Walker dies, OM-6 Walker deals damage to each player equal to twice the number of nonbasic lands that player controls.