msem-instigator

({T}: Add {W}.)
Bustling Docks enters tapped.
{W}, {T}, Reveal a white card from your hand: Target creature gets +1/+0 until end of turn.

({T}: Add {W} or {U}.)
Bustling Harbor enters tapped.
Cycling {2} ({2}, Discard this card: Draw a card.)

Bustling Marketplace can't be sacrificed.
{T}: Add one mana of any type that a land you control could produce.
{0}: Bustling Marketplace's owner may draw a card. If they do, untap Bustling Marketplace and gain control of it until end of turn. Only your opponents may activate this ability and only once each turn during their turn.

({T}: Add {W}.)
Bygone Guardian enters tapped.
Vigilance
{2}{W}{W}: Bygone Guardian becomes a creature in addition to its other types until end of turn.

({T}: Add {W}.)
As Calcified Dunes enters, you may pay 1 life. If you don't, Calcified Dunes enters tapped.

Calciform Wastes enters tapped. When it does, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this, then you may put that card into your graveyard.)
{T}: Add {W}.
{2}{W}{W}: Calciform Wastes becomes a Turtle creature. (This effect lasts indefinitely.)

Calmed Battleground enters tapped unless you control a Plains.
{T}: Add {B} or {R}.

{T}: Add {C}.
{T}, Pay 1 life: Add {U} or {R}.

{T}, Pay 1 life: Add {R} or {G}.
{2}, {T}, Sacrifice Capital Towpath and another permanent: Draw a card. Activate only during your turn.

Catalina's Turf enters tapped.
When Catalina's Turf enters, you may mill two cards.
{T}: Add {B} or {R}.

Caustic Mangrove enters tapped.
{T}: Add {B} or {G}.
{1}, {T}: Add one mana of any color.

{T}: Add {C}.
{T}, Sacrifice Cave of Pleonexia: Destroy target nonbasic land an opponent controls. You and that player each create a Treasure token. Activate only as a sorcery and only if that land's controller controls four or more lands. (A Treasure token is an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

First strike
Whenever a creature blocks Celestial Conscript, put a -1/-1 counter on that creature.

{T}: Add {C}.
Civilized — {T}: Add {C}{C}. Activate only if you control an artifact, a creature, and an enchantment.

At the beginning of your upkeep, each opponent loses 1 life and you gain 1 life.

{T}: Add {C}.
{T}: Add one mana of any color among creatures and planeswalkers you control.
{T}: Target player may gain control of target permanent you own. (That player may choose not to.)

Chamber of Splendor enters tapped.
When Chamber of Splendor enters, 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.”)
{T}: Add {C}.

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

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

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

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

Chigau Market Outskirts enters 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.

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