msem-instigator

{T}: Add {C}.
{T}: Untap target legendary creature you control. Activate only once each turn.

Flash
When Commanding Princess enters, choose two —
• Commanding Princess deals 2 damage to any target and you gain 2 life.
• Return target permanent card with mana value 2 or less from your graveyard to your hand.
• Destroy target artifact or enchantment.
• Create a 1/1 colorless Shapeshifter creature token with changeling.

Adorned — Commoners' Favored gets +2/+2 as long as it's equipped and/or enchanted.

Whenever a player casts a spell, each opponent mills a card.

When Compose from Dreams enters, you may cast any number of cards named Fatigue from your hand and graveyard without paying their mana costs.
Whenever you cast a spell, each opponent loses 1 life. Then you may draw a card if that spell wasn't cast from your hand. Then add {U}{B}{R} if you don't own that spell.

You may have this creature enter the battlefield as a copy of any creature on the battlefield that has a -1/-1 counter on it.

If a player would draw one or more cards except for the first one they draw in each of their draw steps, they exile a card from their hand before they draw those cards.
{1}, {T}: Until end of turn, you may play target card exiled with Compromised Vault, and you may spend mana as though it was mana of any color to cast that spell.

When Compulsion's Voice enters, gain control of target permanent until end of turn. Untap that permanent. It gains haste until end of turn.
Recite {1}{U}{R} (You may cast this creature from your graveyard for its recite cost. If you do, exile it when it enters or if it would leave the battlefield.)

Mark (Whenever this creature attacks, mark target creature until end of turn.)
Whenever a marked creature dies, you lose 1 life and you draw a card.

When Compulsory Studies enters, exile target creature until Compulsory Studies leaves the battlefield. Each player draws a card.

Discard a card: Concealed Slasher gets +1/+1 until end of turn and can't be blocked this turn.

Equipped creature gets +1/+0, has no name, and loses all non-Pirate, non-Rogue creature types.
{1}: Equipped creature gains the creature types and activated abilities of target creature and its name becomes that creature's name until end of turn.
Equip {1}

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.

Spells you cast from exile cost {1} less to cast.

{T}: Conchspear Hunter deals 1 damage to any target. Activate only if you control three or more artifacts.

At the beginning of combat on your turn, you may exile a creature card from your graveyard. Then if a card exiled with Concoquo has flying, creatures you control gain flying until end of turn. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

{T}: Add {G} or {W}. You lose 1 life unless you have less life than an opponent.

When Condemned Cavalier enters, create a white and black Aura Curse enchantment token named Profane March attached to target player. The token has enchant player and “Whenever a creature enchanted player controls attacks, that player loses 1 life and defending player gains 1 life.”

Whenever you cast an enchantment spell, create a 1/1 white and black Bird creature token with flying and vigilance.
Whenever three or more creatures you control deal combat damage to a player, that player sacrifices a creature. If they can't, they discard a card.

Legacy (You may play this side of this card only from your graveyard. Exile it if it would leave the battlefield or not resolve.)
Whenever a Warrior you control becomes the target of a spell or ability an opponent controls, that player loses 1 life and discards a card, then you draw a card and gain 1 life.

Ferocious — At the beginning of your first main phase, if you control a creature with power 4 or greater, add {R}.

When Conduit of the Conflux enters, scry 2.
{T}: Add one mana of any color.

At the beginning of combat on your turn, you lose 1 life and rouse 1. (Put a +1/+1 counter on a permanent you control. If it isn't a creature, tap it and it becomes a 0/0 creature in addition to its other types.)

Other Knight creatures you control get +1/+1.

When Confident Traveler dies, create a 1/1 white Human creature token. If Confident Traveler was sacrificed, create two of those tokens instead.