msem-instigator

When Shadowbinder Touka enters or attacks, exile up to one target creature card from a graveyard.
You may play creature cards exiled with Touka.
Sacrifice another creature: Add two mana in any combination of colors. You can't spend this mana to cast spells from your hand. If this mana is spent to cast a creature spell, that creature enters with a finality counter on it.

Riko's Academy enters tapped.
When Riko's Academy enters, you may mill two cards.
{T}: Add {R} or {W}.

Trample
Art of war — At the beginning of your end step, if Dragon's Wake dealt damage to an opponent this turn, gain control of target land for as long as Dragon's Wake remains on the battlefield.
Tap three untapped creatures you control: Dragon's Wake becomes an artifact creature until end of turn.

Rhapsody {4}{R}{R} (Pay {4}{R}{R} to cast this as a 4/4, or as a sorcery to make it become a 4/4.)
Menace

Ayala, Shrouded Shepherd can't attack or block unless your life total is greater than or equal to your starting life total.
Lifelink, indestructible
Whenever a creature attacks you or a planeswalker you control, you may pay {2}. If you do, create a 1/1 white Spirit creature token with lifelink blocking that creature.

Enchant land
When Unexplored Regions enters, draw a card.
Enchanted land is an artifact in addition to its other types and has “{T}: Add one mana of any color.”

Equipped creature has menace.
Whenever equipped creature attacks, look at the top two cards of your library. Put any number of them into your graveyard and the rest back on top of your library in any order.
Equip {2}

Enchant player
At the beginning of enchanted player's upkeep, their life total becomes 10.

Target player draws a card for each card in their graveyard.

Unvirtuous Maestro can't be blocked except by three or more creatures.

Menace, lifelink
Whenever Jonah of the Spellbane deals combat damage to a player, destroy target creature or planeswalker, then scry 1.

Target creature gets +2/+2 and gains trample until end of turn.

Whenever an Actor you control becomes untapped, you may discard a card. If you do, draw a card.

Whenever you cast your second spell each turn, if it's an instant or sorcery spell, you may pay {1}{R}. If you do, gain control of target creature an opponent controls until end of turn. Untap that creature. It gains haste until end of turn.

Target player reveals their hand. You and that player secretly choose a nonland card from it. Then those cards are revealed. That player discards the chosen cards.

If you control an artifact, create three 1/1 colorless Construct artifact creature tokens. Otherwise, create one of those tokens.

Flash
When Dreamnapper enters, another target creature phases out until Dreamnapper leaves the battlefield. (Treat it and anything attached to it as though they don't exist as long as it's phased out.)

First mate—Each nonland card in your starting deck targets or has an ability that targets. (If this card outside the game is your chosen first mate, you may swap it with a card in your opening hand.)
Hexproof
Whenever a permanent you don't control becomes the target of a spell or ability you control, create a token that's a copy of that permanent.

Defender (This creature can't attack.)
{W}, {T}: You gain 1 life.

Flying, haste
{2}{B}{R}: Return Edarna's Augurling from your graveyard to the battlefield. Return it to your hand at the beginning of the next end step. Activate only as a sorcery.

Forest Fire deals 4 damage to target creature or planeswalker. (Then exile this card. You may cast the creature later from exile.)

Counter target creature spell. Audition for blue. (Create a 1/1 Construct Actor creature token, a Wizard Role giving 2/2 and prowess, or a Warlock Role giving 2/1 and flying. Roles replace older ones.)

Soldiers you control get +1/+1.
Whenever one or more creatures attack, create a 1/1 red Soldier creature token.

Counter target spell.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, that spell's controller reveals their hand. You may exile a nonland card from that player's hand. If you do, that player draws a card.

As an additional cost to cast this spell, sacrifice a creature.
Create X Treasure tokens, where X is the sacrificed creature's mana value.