msem-instigator

Rediscover an artifact card, then do the same for creature, enchantment, instant, land, planeswalker, and sorcery. (Each time, look at the top card of your library. You may reveal it and put it into your hand if it's of that type. Otherwise, put it back or into your graveyard.)

Exile target instant or sorcery spell you control. Until end of turn, you may cast that card from exile without paying its mana cost. When you do, copy it. You may choose new targets for the copy.

Return target instant or sorcery card from your graveyard to your hand.
Draw a card.

Trial 6 (As you cast this spell, an opponent of your choice may pay 6 life. If they don't, they fail the trial.)
Flying
When Reckoner of Man enters, if the trial was failed, it deals 3 damage to each creature you don't control.

Whenever Reclamation Grovesculptor enters or attacks, put a growth counter on target noncreature permanent. It becomes a colorless Forest land and loses all other card types and land types.

Flash

As an additional cost to cast this spell, pay {2} or sacrifice a creature.
Menace

When Recognification Process enters and at the beginning of your upkeep, create a token that's a copy of target artifact you control, then sacrifice an artifact.

Flash
Creatures your opponents control have base power and toughness 1/1.
Fleeting {1}{W}{W} (You may cast this spell for its fleeting cost. If you do, sacrifice it at the beginning of the next end step.)

Deception {U} ({U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever a Pirate or Rogue you control deals combat damage to a player, rediscover a Pirate or Rogue card. (Look at the top card of your library. You may reveal it and put it into your hand if it's a Pirate or Rogue. Otherwise, put it back or into your graveyard.)

When Recursion Runner enters, create a Function token with “If this spell isn't a copy, copy it. You may choose new targets for the copy.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Counter target spell.
Create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

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.)

Indestructible
When Reflected Worldwalker enters, each player puts their hand into their sideboard.

Destroy all creatures. If a Reflection would be destroyed this way, its owner shuffles it into their library instead.

Destroy all monocolored creatures.

Counter target spell.
{1}{U}, Exile Refute from your graveyard: Draw a card.

Each player sacrifices three lands. Regal Ignition deals 3 damage to each nonlegendary creature.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
As long as you control three or more artifacts, Regal Seasnake has vigilance. (Attacking doesn't cause it to tap.)

This spell costs {1} less to cast for each artifact you control.
Search your library for an artifact creature card with mana value X or less, put it onto the battlefield, then shuffle.

Counter target spell.
Satrapycycling {2} ({2}, Discard this card: Search your library for a Satrapy card, reveal it, put it into your hand, then shuffle.)

Untap all basic lands you control.
Draw a card.

When Relentless Pathcutter enters, create a green Aura enchantment token named Enmity attached to target creature. The token has enchant creature and “Enchanted creature gets +2/+0 and has trample.”
When Relentless Pathcutter dies, return it to its owner's hand.

Search target opponent's library for an artifact card and put it onto the battlefield under your control, then that player shuffles. If you don't put a card onto the battlefield this way, create four Gold tokens. At the beginning of the next end step, sacrifice each artifact put onto the battlefield this way. (This includes the Gold.)