msem-instigator

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

Deception {1}{B} ({1}{B}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Nightfall Infiltrator deals combat damage to a player, that player discards a card.

Flying, lifelink
Whenever Nightfall Sphinx or another creature you control enters, each opponent loses 1 life and you gain 1 life.

Whenever you cast a spell, Nightfire Adept gets +3/+0 until end of turn if that spell has the same name as a card in your graveyard.

Whenever Nightly Herald attacks, it deals damage to the defending player equal to the number of Wolves and Werewolves you control.

Whenever a creature deals combat damage to you, that creature's controller gains control of Nightmare Alley.
{T}: Add {C}.
{1}, {T}: Target attacking creature gets +1/+0 until end of turn and can't be blocked this turn.

Whenever a storied permanent you control enters, each opponent discards a card. (Enchantments and legendary permanents are storied.)

Flash
Flying
Whenever a player discards a card, you draw a card. This ability triggers only once each turn.

At the beginning of your upkeep, if Nightmare Riders is in your graveyard, you may mill two cards.

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.)
[Lore I-II] You gain 1 life.
[Lore III] Target creature you control gains first strike until end of turn.

{B}, Discard a card: Post a bounty on target creature. (Put a bounty counter on that creature. It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)

Other Rogues you control have menace.
{2}{U}: Target blocking creature gets -1/-0 until end of turn.

Whenever Nightrail Printer attacks, you may tap target creature.

Nightshade Cultivator has deathtouch as long as five or more cards are in your graveyard.

Whenever a creature dies, its controller loses 1 life.

Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)
{1}{G}: Nightshade Slayer gets +2/+2 until end of turn. Activate only once each turn.

Nightshaper's Domain enters tapped.
{T}: Add {B}.

Flying
At the beginning of your upkeep, mill seven cards, then you may cast an instant or sorcery card from your graveyard. If that spell would be put into your graveyard, exile it instead.
If you would draw a card while your library has no cards in it, you win the game instead.

Whenever a creature attacks one of your opponents, that player loses 1 life.

Choose X. Target player reveals their hand and discards all nonland cards with mana value X.

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

First strike
Crew 1 (Tap any number of creatures you control with total power 1 or greater: This Vehicle becomes an artifact creature until end of turn.)

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.

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

As Nimble Sandstorm enters, choose speed or power.
At the beginning of combat on your turn,
• Speed — Target creature gains haste until end of turn.
• Power — Target creature gets +2/+0 until end of turn.