msem-instigator

[+1]: Until your next turn, whenever up to one target permanent deals damage to another permanent or player, it deals that much damage to itself.
[–X]: When you next cast a noncreature spell with mana value X or less this turn, copy it. You may choose new targets for the copy.
[–2]: Create an X/X blue Spirit creature token, where X is the number of colors of mana you've spent to cast spells this turn.

Whenever Weaver of Lore attacks, you may reveal your hand. Weaver of Lore gets +2/+2 until end of turn if you reveal two or more blue cards this way.

Disappointment's power and toughness are each equal to the number of differently named lands you control.
Whenever Disappointment enters or deals damage to a player or noncreature permanent, you may return target nonland permanent card from your graveyard to the battlefield. It's a land with “{T}: Add one mana of this card's colors” and loses all other types and abilities.

Destroy target artifact or enchantment. Its controller gains 4 life.

Puzzlebox (Begin the game with this and another card you own from outside the game in the command zone, locked. That card is face down until you unlock this.)
{1}, Sacrifice two Clues: Unlock Hall of Lost Histories and put the revealed card into your hand.

Whenever Cavern Monstrosity attacks, exile the bottom card of your library. You gain life equal to its mana value.

Search your library for a card, reveal it, then shuffle and put that card on top. You lose life equal to its mana value.

Trample
When Ironhide Hadhayosh dies, put two +1/+1 counters on target creature you control.

Augmented — When TD-3 Slyten Retriever enters, if it's not a token and you've spent {W}{U}{B}{R}{G} to cast spells this turn, create a token that's a copy of it.
When TD-3 Slyten Retriever dies, draw a card and gain 3 life.

{T}: Untap target land.
{4}{G}: This creature gets +3/+3 until end of turn.

When Inspired Blade enters, if you control another Warrior, draw a card.

When Cloister enters, exile another target nonland permanent you control and target nonland permanent you don't control until Cloister leaves the battlefield.
{2}{W}, Sacrifice Cloister: You gain 5 life.

Whenever you cast an instant or sorcery spell, you may have Xenocrata's Fleet become a 4/4 Ship artifact creature with haste until end of turn.
Whenever Xenocrata's Fleet deals combat damage to an opponent, create that many 1/1 red Warrior creature tokens.

As an additional cost to cast this spell, pay {2} or put a -1/-1 counter on a creature you control.
Munitions Explosion deals 3 damage to any target.

Vigilance
Whenever Lijing, the True Divinity or another nontoken creature you control enters, choose one —
• Create a 1/1 white Fox Spirit creature token.
• Invigorate 1. (Choose a creature with the least power among creatures you control and put a +1/+1 counter on it.)

Destroy target creature with flying. Judge up to one target creature you control. (Honor it by putting a +1/+1 counter on it or condemn it by sacrificing it to draw a card.)

{5}, {T}, Sacrifice Voidlife Orbs: Destroy all nonland permanents. You can't spend more than one color of mana to activate this ability.

Choose one —
• Target player mills four cards.
• Draw a card.

When Ninhasir's March enters, it deals 3 damage to any target.
{1}{R}{R}: Transform Ninhasir's March. Activate only if your fealty to Mountains is five or greater.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Whenever Conchhorn Shinygrabber attacks, you may pay {1}. If you do, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
{W}{U}{B}{R}{G}: Conchhorn Shinygrabber gets +3/+3 and gains lifelink until end of turn.

When Familial Matriarch enters, nourish 2. (To nourish 2, either put two +1/+1 counters on this creature or create two 1/1 white Citizen creature tokens.)

You may look at the top card of your library any time.
Once each turn, you may cast an instant or sorcery spell from the top of your library.
{4}{R}: Transform Paranormal Convergence. Activate only as a sorcery and only if the total number of instant and/or sorcery cards you own in exile and in your graveyard is seven or more.

When Dawn Silhouette enters, you may exile target creature not named Dawn Silhouette you control. Return that card to the battlefield under your control at the beginning of the next end step.
Mirage {1}{W} (You may cast this spell as though it had flash for its mirage cost. If you do, sacrifice it at the beginning of the next cleanup step.)

Target creature you control gets +X/+X until end of turn. It fights target creature you don't control.

Nontoken creatures get -2/-2 until end of turn.
Fuse (You may cast one or both halves of this card from your hand.)