{T}, Tap an untapped creature you control: Choose one — • Add one mana of any color. • Target player loses 2 life. • Target player gains 3 life. • Target player mills four cards.
Clocktower Hideout enters tapped. When Clocktower Hideout enters the battlefield, look at the top card of your library. You may put it into your graveyard. {T}: Add {B} or {R}.
Clockwork Gaucho enters the battlefield with a +1/+1 counter on it. Other artifact creatures you control get +1/+1 for each +1/+1 counter on Clockwork Gaucho. {T}: Put a +1/+1 counter on Clockwork Gaucho.
({T}: Add {R}.) As Cloudpeak Spires enters the battlefield, you may pay 1 life. If you don't, Cloudpeak Spires enters the battlefield tapped. Basic lands you control have “{T}: Add {R}.”
{T}: Add {C}. {1}: Clutch of the Coil becomes a 1/1 Snake creature with poisonous 2 until end of turn. It's still a land. (Whenever this creature deals combat damage to a player, that player gets two poison counters.)
The Soulbreaker Gang offers a portion of each robbery's spoils to the dead god Aghavaan.
{1}, {T}: Draw a card, then exile a card from your hand face down until Cluttered Study leaves the battlefield. (It returns to your hand.) {3}, {T}: Shuffle Cluttered Study into its owner's library.
“I didn't lose it. Give me five, maybe twenty minutes.”
{T}: Add one mana of any color. {T}: Put a charge counter on Coalition Relic. At the beginning of your precombat main phase, remove all charge counters from Coalition Relic. Add one mana of any color for each charge counter removed this way.
When Cobbled Currency enters the battlefield, discard a card, then draw a card. {3}, Sacrifice Cobbled Currency: Discard two cards, then draw two cards.
Extort (Whenever you cast a spell, you may pay {W/B}. If you do, each opponent loses 1 life and you gain that much life.) Other artifacts you control have extort. Whenever a spell you control resolves, if it was extorted three or more times, each opponent discards a card and you draw a card.
When Collapsing Frame enters the battlefield, search your library for a basic land card, reveal it, put it into your hand, then shuffle. {2}, Sacrifice Collapsing Frame: Draw a card.
{T}: Add {C}. {T}, Pay 1 life: Add {B}. {5}{B}, {T}, Sacrifice Collapsing Ridges: Return target creature card from a graveyard to the battlefield under your control. Activate only as a sorcery.