msem-instigator

If you would choose one or more modes, you may choose an additional mode. (Modal spells and abilities are indicated by • listed modes.)
{1}, {T}: Add one mana of any color.
{6}, {T}: Add {W}{W}{U}{U}{B}{B}{R}{R}{G}{G}.

When Nidohagane Warfans enters, if it's not a token, create a token that's a copy of it.
Equipped creature gets +1/+0.
Equip {1}

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.

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.

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.”)

Indestructible
When this creature transforms into Ninhasir, God of Creation, discard all the cards in your hand, then draw that many cards plus one.
Whenever you cast an instant or sorcery spell, copy it. You may choose new targets for the copy.

{T}: Add {C}.
Satrapies you control have “{U}, {T}: Each opponent mills a card.

As Nizev Fortress enters, you may pay 1 life. If you don't, Nizev Fortress enters tapped.
Satrapies you control have “{T}: Add {U}.”

Nizev Sanctuary enters tapped.
Satrapies you control have “{T}: Add {U} or {R}.”

Nizev Temple enters tapped.
Satrapies you control have “{T}: Add {U} or {B}.”

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

({T}: Add {B} or {G}.)
Whenever Nomad's Township becomes tapped, you lose 1 life unless you control two or more basic lands.

You may return a land you control to its owner's hand rather than pay this spell's mana cost.
Northern Express Line enters tapped.
{T}: Add {U}.

Northrime Aurora enters tapped unless you played it from exile.
{T}: Add {G} or {U}.

Noxan Altar enters tapped.
{T}: Add {W} or {B}.
{W}{B}, {T}, Tap an untapped creature you control: Create a Function token with “Lifelink.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Noxious Garden enters tapped.
As Noxious Garden enters, choose a color other than black.
{T}: Add {B} or one mana of the chosen color.

Activated abilities of other permanents cost an additional “Sacrifice a permanent” to activate unless they're mana abilities.
{2}, {T}, Sacrifice Nullifier of Planar Energy: Remove all counters from target nonland permanent.

Equipped creature has “{T}: This creature deals 1 damage to any target.”
Equip {3}

At the beginning of your end step, judge target creature you control. (Honor it by putting a +1/+1 counter on it or condemn it by sacrificing it to draw a card.)

Observation Field enters with three charge counters on it.
{2}, {T}, Remove a charge counter from Observation Field: Draw a card and gain 2 life.
{T}, Sacrifice Observation Field: Shuffle any number of target cards from your graveyard into your library.

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.

Enchant planeswalker
Enchanted planeswalker has “+2: Draw two cards, then put a card from your hand on the bottom of your library.”

{2}, {T}, Sacrifice Old Map: Search your library for a basic land card, put it onto the battlefield, then shuffle.