msem-instigator

Your opponents can't search libraries unless they pay {2}.
[+2]: If an opponent has more life than you, you gain 2 life.
[0]: If an opponent controls more creatures than you, you create two 1/1 white Gnome creature tokens.
[–4]: Search your library for a creature card with mana value 2, put it onto the battlefield, then shuffle.

Flying
Whenever Novean Sky Swallower blocks or becomes blocked by a creature with flying, destroy that creature, then put a +1/+1 counter on Novean Sky Swallower.

Destroy target creature an opponent controls, then that player sacrifices a creature.

Each player sacrifices a creature, then you gain 2 life for each creature that died this turn.

Destroy target noncreature, nonland permanent. (Destroying a battle doesn't remove counters from it.)
Flashback {3}{W}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Identity — As long as you control at least two other creatures that share a creature type with Danuri Eaglerider, Danuri Eaglerider gets +1/+2 and has flying.

Seaside Citadel enters tapped.
{T}: Add {G}, {W}, or {U}.

Counter target spell unless its controller pays {2}. If that spell is countered this way, exile it instead of putting it into its owner's graveyard.

Flying
When Skyborne Strategist enters, amass Soldiers 1. (Put a +1/+1 counter on an Army you control. It's also a Soldier. If you don't control one, create an 0/0 black Soldier Army creature token first.)

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.)
[Lore I-II] You may discard a card. If you do, draw a card.
[Lore III] Create a token that's a copy of another target creature you control, except it has haste. Sacrifice it at the beginning of the next end step.

All damage that would be dealt to you is dealt to Escyf, Fallen Sundancer instead.
Whenever Escyf perseveres, put a +1/+1 counter on it. (A creature perseveres when it survives damage.)

When Lysander Jal enters, create a token that's a copy of another target noncreature permanent you control.
Whenever you cast a spell from your graveyard, return target permanent card from your graveyard to your hand.

When Tempered Ankulim enters, choose one —
• You gain 2 life.
• Each opponent loses 2 life.

Archive 4 (As this enters, shuffle the top four 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, destroy all nonland permanents you don't control with the same mana value as the drawn card.

Repeat the following process X times. Exile a creature you control, then return it to the battlefield under your control.
Exile Lazaire's Conjuring.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Whenever Skysovereign Griffin attacks, it gets +1/+0 until end of turn for each other attacking creature with flying you control.

Whenever you make first contact, you may draw a card. If you do, put a card from your hand on the bottom of your library. (You make first contact the first time each turn you cast a spell with a name not in your graveyard or control already.)

First strike
Prevent all noncombat damage that would be dealt to Royal Knight.

Take an extra turn after this one. If this spell was cast from exile, take two extra turns after this one instead. Shuffle Reflected Moment into its owner's main library.
Prophecy {6}{U}{U} (Once each turn, you may exile a card with prophecy as you reveal it. When you do, you may cast it for its prophecy cost as long as it's exiled.)

When Gleeful Deviser enters, create a 1/1 colorless Construct artifact creature token.

You may cast this spell as though it had flash if you control a Dragon or spend an additional {2} to cast it.
Draw three cards.

Each player loses 2 life, discards two cards, sacrifices two creatures, then sacrifices two lands.

Create two 1/1 red Pirate creature tokens. Surveil 1.

Counter target spell unless its controller pays {2}. If that spell targets you or a permanent you control, counter that spell instead.