msem-instigator

You may reveal a Revelation card you own from outside the game or choose a face-up Revelation card you own in exile. Put that card into your hand. Exile From Stars Above.

Frondpond Prankster can't be blocked.
Whenever Frondpond Prankster enters or deals combat damage to a player, target player reveals their hand, then you choose any number of nonland cards from it. That player puts those cards on the bottom of their library in a random order, then draws that many cards.

When Frost Walker becomes the target of a spell or ability, sacrifice it.

Flying
Artifact spells you cast cost {1} less to cast.

Flying
This spell can't be countered.
When Frostbreath Dragon enters, tap target creature. It doesn't untap during its controller's next untap step.
Whenever Frostbreath Dragon becomes the target of a spell or ability, counter it unless its controller pays {2} and discards a card.

Deception {2}{U} ({2}{U}, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)
Whenever Frostclaw Shinobi deals combat damage to a player, scry 1, then draw a card.

Enchant creature
Enchanted creature can't become untapped.
{4}{U}: Return Frozen Halo and enchanted creature to their owners' hands.

This spell costs {4} less to cast if a player attacked with four or more creatures this turn.
End the turn.

Put target creature on the bottom of its owner's library. That player reveals cards from the top of their library until they reveal a creature card, then puts all cards revealed this way into their graveyard.

Choose one —
• Return all tapped creatures to their owners' hands.
• Return all untapped creatures to their owners' hands.

Flash
Flying
When Gale Conjurant enters, return target spell to its owner's hand if its mana value is less than or equal to the number of creatures in Gale Conjurant's pack. (Two or more creatures you control with equal power are in a pack.)

Flying
If a triggered ability of another permanent you control would trigger for the first time each turn, that ability triggers an additional time.

Return target creature to its owner's hand. You may have another target creature gain flying until end of turn.

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

(Transform this if it's not attached to a creature. Pay {3}{U} as a sorcery to unattach it.)
Enchant creature you control
Gamhaugen Warbeast's rider gets +2/+2 and has flying.

Pressure {1}{U}{U} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
Draw three cards.

Enchant opponent
Enchanted player plays with the top card of their library revealed.
Whenever enchanted player casts a spell, you may have them mill a card.

Choose flying, prowess, vigilance, or ward {2}. Create a colorless Equipment artifact token with “Equipped creature has the chosen ability” and equip {2}. (Then exile this card. You may cast the creature later from exile.)

Draw two cards.
You may cast an instant or sorcery spell with mana value 3 or less from your hand or graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.

Mark (Whenever this creature attacks, mark target creature until end of turn.)
Whenever Gentleman Thief deals combat damage to a player, gain control of target marked creature.

Whenever Gentry Infiltrator deals combat damage to a player, you may search that player's library for a creature card and exile it. If you do, that player shuffles.
{2}{U}{U}: Gentry Infiltrator becomes a copy of a creature card exiled with it until end of turn.

Target permanent phases out. (Then exile this card. You may cast the artifact later from exile.)

Flying
Creatures your opponents control get -1/-0.

Exile two target artifacts, creatures, and/or lands you control, then return those cards to the battlefield under your control.