msem-instigator

Ward {2} (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays {2}.)
At the beginning of your end step, if you cast no spells this turn, exile the top card of your library. If it's a nonland card, you may cast it without paying its mana cost.

Journey three times. (Exile the top three cards of your library face up. Whenever a creature you control deals combat damage to an opponent, put a journeyed card you own into your hand.)

Flying
Cruel Fledgling enters with a +1/+1 counter on it if six or more cards are in your graveyard.

Pressure {U}{U} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
Counter target spell.

Reveal the top three cards of your library. Target opponent may have you put those cards into your hand. Otherwise, put those cards into your graveyard, then draw three cards.

Flying
Breach (Whenever this deals combat damage to a player, you may have it become an Aura Curse until your next turn. Attach it to that player.)
Whenever a cursed opponent draws a card, you may draw two cards.

Enchant creature (Target a creature as you cast this. This card enters attached to that creature.)
When Cuff Down enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Flash
When Culi-Sae Mesmer enters, return all permanents attached to target permanent or player to their owners' hands.

Flash (You may cast this spell any time you could cast an instant.)
When Culi-Sae Transfigurer enters, switch target creature's power and toughness until end of turn.

Escalate {U}{U} (Pay this cost for each mode chosen beyond the first.)
Choose one or more. You may choose the same mode more than once.
• Return target permanent to its owner's hand.
• Shuffle any number of cards from your hand into your library, then draw that many cards plus one.

{T}: Add {C}.
Whenever Cunning Chanter becomes tapped, each opponent mills a card.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)
As long as an opponent has ten or more cards in their graveyard, Cunning Infiltrator gets +3/+2 and can't be blocked.

Flash
When Cunning Mimic enters, sacrifice it unless you return another artifact or creature you control to its owner's hand.

You may look at the top card of your library.
{T}: You may play the top card of your library.

If an opponent would draw one or more cards, that player instead draws that many cards plus one, then exiles a card from their hand.
You may play cards exiled by Curated Citations, and you may spend mana as though it was mana of any type to cast them.

Flying
When Curator of Curios enters, draw a card for each glory counter you have.

Flying
Whenever one or more counters are put on a creature you control, Curio Siren gets +1/+0 until end of turn.

Enchant creature
Whenever enchanted creature deals damage to an opponent, you may draw a card.

{1}, Sacrifice Curious Fossil: Scry 2.
{2}{U}: Return Curious Fossil from your graveyard to the battlefield transformed. Activate only during your turn.

Elemental, Demon, and Spirit spells you cast cost {1} less to cast.
Whenever you cast a Elemental, Demon, or Spirit spell, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Enchant opponent
Creatures enchanted player controls get -1/-0.

At the beginning of your upkeep, mill a card.
Whenever a creature card is put into your graveyard from your library, you may exile it. If you do, create a 2/2 black Zombie creature token.

Counter target spell with mana value 3 or less.

Glitch {1} (Remove one [restriction] for each time you pay the glitch cost.)
Take an extra turn after this one.
[Skip the untap step of that turn.]
[Skip the draw step of that turn.]
[Skip the combat phase of that turn.]
Exile Cut Causality.

Whenever Cutthroat Spy deals combat damage to a player, you may draw a card.