msem-instigator

Flying
Whenever another creature enters, you gain 1 life.

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.

When Nomadic Patriarch enters, nourish 1. (To nourish 1, either put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token.)
Remove a +1/+1 counter from Nomadic Patriarch: Put a +1/+1 counter on each other creature token you control.

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}.

As long as it's not your turn, Northrime Amalgam gets -2/+2.

Flying
Menagerie — When Northrime Messenger enters, if there are five or more creature types among creatures you control, you may search your library for a Quest card, reveal it, put it into your hand, then shuffle.

When Norwick Barkeep enters, target creature you control gets +1/+1 and gains vigilance until end of turn.

Prevent all combat damage that would be dealt this turn by creatures other than Citizens and Peasants.

Flash
When Notorious Smuggler enters, target opponent reveals their hand. Choose a nonland card revealed this way. Copy it. You may cast the copy this turn. (You still pay its costs, including color. Copies of permanents enter as tokens.)

Prowess
Whenever you cast a noncreature spell, Noxan Pilgrim gains lifelink until end of turn.

If another creature with a +1/+1 counter on it you control would die, instead remove a counter from it. If you do, it phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

Abilities of creatures you activate that aren't mana abilities cost {2} less to activate. This effect can't reduce the mana in that cost to less than one mana.
{T}: Target creature gains haste until end of turn.

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.

Archive 3 (As this enters, shuffle the top three cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Whenever you draw a card from the archived library, target creature you control can't be blocked this turn.

Null Bit deals 3 damage to any target.
You may discard a card. If you do, draw a card.

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.)

Target attacking creature gets +3/+1 and gains trample until end of turn. (Then exile this card. You may cast the creature later from exile.)

Whenever an enchantment you control enters, draw a card. This ability triggers only once each turn.
As long as you control three or more enchantments, Nykthos Enchantress gets +2/+2 and has vigilance.

Defender, first strike
{1}{G}: Oaken Spearman can attack this turn as though it didn't have defender.

Search your library for two basic land cards, reveal them, put them into your hand, then shuffle.

Whenever you cast a cryptic spell, Oasis Cattle gets +1/+1 until end of turn, then untap it. (Artifacts, enchantments, and modal spells are cryptic.)

Search your library for a basic land card or Desert card, reveal it, put it into your hand, then shuffle.
Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Search your library for a nongreen creature card with mana value X or less and put that card onto the battlefield, then shuffle. That creature seeks secrets or valor. (Give it that Oath Aura. Fulfill secrets by attacking with it and two or more other creatures to draw a card. Fulfill valor by dealing combat damage to a player to create a 2/1 white Soldier token.)

Oathbreaker Orc attacks each combat if able.
Whenever Oathbreaker Orc attacks, it deals 2 damage to defending player unless that player sacrifices a permanent.

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.