msem-instigator

Instant, sorcery, and legendary spells you cast cost {1} less to cast.

When Loresprout enters, if you control another creature, draw a card.

{2}{G}: Loreweaver's base power and toughness each become equal to the number of cards in your graveyard until end of turn.

Return target nonland permanent to its owner's hand.
Dominance — If you control the creature with the greatest power or tied for the greatest power, you may put that permanent on top of its owner's library instead.

Exile up to one target creature or planeswalker. Its controller gains life equal to its mana value.
Orchestrate {W} (You may exile this card from your hand any time you could cast a sorcery for its orchestrate cost. When you next resolve a spell, you may cast this from exile without paying its mana cost.)

Tap target creature. Prevent all damage that would be dealt to and dealt by that creature this turn.

Submerge target spell. (To submerge a card, exile it, then put it on the battlefield face down under its owner's control as a 2/2 creature.)

Counter target spell. Create a 1/1 blue Elemental creature token with flying.

When Lost Crew enters or dies, crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)

Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)
{1}{B}: Lost Dancer becomes black and gains lifelink until end of turn.

Lost Explorer has first strike as long as it's attacking.
{1}{B}, Exile Lost Explorer from your graveyard: Crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)

When Lost Kitten leaves the battlefield, create a 1/1 white Peasant creature token.

Enchant opponent
When Lost Knowledge enters, enchanted player reveals their hand.
{1}, Sacrifice Lost Knowledge: Scry 2, then draw a card.

Choose two —
• You gain 3 life.
• Lost Memories deals 3 damage to any target.
• Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Glitch {2} (Remove one [restriction] for each time you pay the glitch cost.)
Put target creature [spell] on top of its owner's library.

Flying
Heretic (Whenever you cast a spell that doesn't share a color with this creature, it gets +1/+1 until end of turn.)

Counter target spell. If a noncreature spell is countered this way, conjure a card named Fatigue and put it on top of your library. (It's a colorless sorcery that costs {2} with “Draw a card.”)

Target player discards two cards.

Exile target nonland permanent.

Put target nonland permanent on top of its owner's library.
Create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

Target creature gets +2/+2 until end of turn. Untap it.

Look at the top three cards of your library. Put one of them into your hand. Put Lost in Deep Storage and the rest on the bottom of your library in any order.

Enchant creature
Enchanted creature can't attack or block, and its activated abilities can't be activated.
Mirage {W/U} (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.)

Exile target permanent. Return that card to the battlefield under its owner's control at the beginning of the next end step.

This spell costs {1} less to cast if you've cast another spell this turn.
Destroy target creature.