msem-instigator

If a creature dealt damage by equipped creature this turn would die, exile that card and draw a card instead.
Equip {1}

Indestructible
If Tarraka-no-Oni would be put into a graveyard from anywhere, reveal Tarraka-no-Oni and shuffle it into its owner's library instead.

Trial 3 (As you cast this spell, an opponent of your choice may pay 3 life. If they don't, they fail the trial.)
When Inspired Trialmaker enters, if the trial was failed, add {R}{W}{B}.

When Gleamhorn Gargantuan enters, put a +1/+1 counter on up to one other target creature.
Cycling {2} ({2}, Discard this card: Draw a card.)

When Into the Unknown enters, create two 1/1 Scout creature tokens that are all colors.
Whenever a land you control enters, if it doesn't have the same name as another land you control, put a +1/+1 counter on each creature you control.

Flash
First strike
When Imposing Databdara enters, return each other creature with toughness less than or equal to the number of Satrapies you control to their owners' hands.

Indestructible
Marva of Endless Inspiration can't attack or block unless you've cast a spell with mana value 4 or greater this turn.
At the beginning of your end step, return a card at random from your graveyard to your hand. If it's a land card, return it to the battlefield instead.

Herald of the Yaoguai has indestructible as long as two or more creatures you control entered this turn.

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you put one or more +1/+1 counters on a creature, add a quest counter.
1, 2 — Create two 1/1 green and white Mouse Soldier creature tokens with vigilance.
3 — Until end of turn, creatures you control get +1/+1 and gain lifelink.

Hexproof
Whenever this creature transforms into Tsunami Titan or attacks, you may return target creature to its owner's hand.

({T}: Add {G} or {W}.)
Sungrace Meadows enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

{T}: Add one mana of any color.
Augmented — Whenever a nontoken creature you control enters, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on it.

Counter target spell unless its controller pays {2} for each Wizard on the battlefield.

When Obscure Apostle enters, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
Whenever you sacrifice an Idol, Obscure Apostle can't be blocked this turn.

Prevent all damage that would be dealt to you this turn. You gain 1 life for each creature you control.

Flying, haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

When Vedalken Wingcrafter enters, create a 1/1 colorless Thopter artifact creature token with flying.

Hexproof
Mist-Valley Ancient enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Return each nonland permanent your opponents control to its owner's hand.

Cosmic Coalescing deals X damage to any target. You may reveal a noncreature card with mana value X or less you own from outside the game and put it into your hand. X can't be 0.
Exile Cosmic Coalescing.

As an additional cost to cast this spell, sacrifice a creature or pay {3}{B}.
Exile target creature or planeswalker.

Menace
Whenever CySec Blacksuit deals combat damage to a player or planeswalker, create a Function token with “Choose a nonland card exiled by this spell. For as long as that card is exiled, you may cast it and you mana of any type can be spent to cast that spell.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

At the beginning of your upkeep, you may choose a color, then exile two cards of that color from your graveyard. If you do, return a creature, instant, or sorcery card of that color from your graveyard to your hand.

Remove a +1/+1 counter from a creature you control: Regenerate Verendas Brawler. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

When Bezoarbeast dies, each opponent loses 2 life and you create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)