msem-instigator

Menace
Ni'Ama's Emissary gets +1/+1 as long as you control a red or white permanent.

{R}{W}{B}, Discard a card named Ni'Ama, God of Adversity: Ni'Ama gains indestructible and becomes a God creature in addition to its other types.
Whenever Ni'Ama enters or attacks, it deals 2 damage to each opponent unless they discard a card. You gain that much life. Repeat this process once.

Flying (This creature can't be blocked except by creatures with flying or reach.)
{B}: Night Screecher gains deathtouch until end of turn. (Any amount of damage this deals to a creature is enough to destroy it.)

Flying
Whenever an opponent discards a card, put a +1/+1 counter on Nightbane Specter.
Whenever Nightbane Specter deals combat damage to a player, that player discards a card.

Put target nonland permanent on top of its owner's library.
Draw a card.

Flying (This creature can't be blocked except by creatures with flying or reach.)
As long as Nightclad Stalker is enchanted, it gets +1/+0 and has deathtouch and lifelink.

Sacrifice a creature: Look at the top card of target player's library. You may have that player put that card into their graveyard.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever Nimble Elemental deals combat damage to a player, you may draw a card. If you do, discard a card.

When Njel Crocodile enters, you may have it fight target creature. (Each deals damage equal to its power to the other.)

{T}: Add {C}.
{3}, {T}, Sacrifice No-Man's Land: Draw a card.

Exile target creature. Each player gains life equal to that creature's toughness.
Metamorph {W} (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.)

At the beginning of each player's upkeep, Noble's Hedonism deals 1 damage to that player, then that player exiles the top card of their library. Until end of turn, they may play that card.

Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the end step.)
Whenever you cast an instant or sorcery spell, Noirohpo Renegade gets +1/+0 until end of turn.

Scry X, where X is the number of artifacts you control, then reveal the top card of your library. If it's an artifact card with mana value X or less, put it onto the battlefield. Otherwise, draw a card.

This spell costs {X} less to cast, where X is half the number of creatures on the battlefield, rounded down.
Destroy all creatures.

Target player mills seven cards. Then exile two cards from that player's graveyard.

Whenever you cast a noncreature spell, Novice Pyromancer deals 1 damage to target player or planeswalker.

Motivate 1 (When this creature enters, you may motivate target creature with less power than this by putting a +1/+1 counter on it.)
When Nroxi Beastmaster motivates a creature, that creature gains trample until end of turn.

Target creature gets -5/-0 until end of turn. You get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

Draw three cards. If you control a Wizard, untap up to three lands.

Whenever a creature enters, destroy it unless its controller pays 3 life.

Obliterating Blast deals 3 damage to any target. A creature dealt damage this way this turn can't be regenerated this turn. If that creature would die this turn, exile it instead.

When Obscure Apostle enters, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
Whenever you sacrifice an Idol, Obscure Apostle can't be blocked this turn.

Tribute 2 (As this creature enters, an opponent of your choice may put two +1/+1 counters on it.)
When Observing Guardian enters, if tribute wasn't paid, create a 2/2 white Cat creature token.

As Ocean Monastery enters, you may pay 2 life. If you don't, Ocean Monastery enters tapped.
{T}, Sacrifice Ocean Monastery: Search your library for a Plains or Island card, put it onto the battlefield, then shuffle.