msem-instigator

{T}: Add {C}.
{T}: Add one mana of any color that a basic land you control could produce.

Charbroiled Core enters the battlefield tapped unless you have two or more opponents.
{T}: Add {B} or {R}.

Charred Marsh enters the battlefield tapped unless you control a Mountain.
{T}: Add {B} or {G}.

Chartered Treasury enters tapped.
When Chartered Treasury enters the battlefield, look at the top card of your library. You may put it into your graveyard.
{T}: Add {R} or {G}.

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
When Cheerful Generator has three or more +1/+1 counters on it, remove them all and transform it.

{X}, {T}, Sacrifice Chemical Grenade: Up to X target creatures each get -1/-1 until end of turn.

Chigau Market Outskirts enters the battlefield tapped. When it does, choose a creature card name.
{T}: Add {B}.
{1}, {T}, Sacrifice Chigau Market Outskirts: You may cast a creature spell with the chosen name from your graveyard this turn.

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a legendary spell or activate an ability of a legendary permanent.

{T}: Add {C}.
{1}, {T}, Sacrifice Chikyu League Arena: Put a +1/+1 counter on target creature. Activate only as a sorcery.

Equipped creature gets +4/+3.
Equip—{2}, Put a -1/-1 counter on a creature you control.

Chiseled Cliffside enters the battlefield tapped unless you have two or more opponents.
{T}: Add {R} or {W}.

As Choked Estuary enters the battlefield, you may reveal an Island or Swamp card from your hand. If you don't, Choked Estuary enters the battlefield tapped.
{T}: Add {U} or {B}.

During your opponents' turns, Chroma, the Faerie Circle has all basic land types in all zones.
Chroma, the Faerie Circle enters the battlefield tapped.

Lands you control have “{T}: Add one mana of any color.”
{T}: Add one mana of any color.

At the beginning of each player's draw step, that player draws an additional card.
Spells cost {1} less to cast.
Players may spend mana as though it were mana of any color.

{2}, {T}, Sacrifice Chronomancer's Bauble: For each permanent with a time counter on it, you may put a time counter on that permanent or remove a time counter from it.

Whenever a player casts a spell, put a time counter on Chronovore Clock. Then if there are ten or more time counters on it, remove all time counters from it and end the turn.

{2/R}{2/R}: Churning Rough-Roller gets +1/+1 and gains double strike until end of turn.

Equipped creature has haste.
Sacrifice Cinderblade: Equipped creature gains +2/+2 until end of turn.
Equip {1}

As Citadel Gates enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped.
{T}: Add {B}, {R}, or {G}.

{X}, {T}: Reveal the top card of your library. If its mana value is X or less, you may play it without paying its mana cost. Otherwise, put it into your hand. X can't be 0.

{T}: Add {C}.
{1}{C}{C}, {T}: Return target legendary creature to its owner's hand.

{T}: Add {C}.
{3}, {T}, Sacrifice City Gate: Put two +1/+1 counters on target creature you control that attacked this turn.

Whenever you cast an instant or sorcery spell, you may exile that card instead of putting it anywhere else as it resolves.
At the beginning of your upkeep, Clash Reactor deals X damage to each opponent, where X is the number of colors of cards exiled with Clash Reactor.

{T}, Pay 1 life: Add {W} or {U}.
{1}, {T}, Sacrifice Cleared Vault: Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)