| Court Hussar | A25-51 |
| Court Homunculus | MM2-13 |
| Courser of Kruphix | A25-164 |
| Courage in Crisis | WAR-158 |
| Countless Gears Renegade | AER-13 |
| Countersquall | DDH-59 |
| Counterspell | CMR-395 |
| Counterspell | A25-50 |
| Counterlash | DKA-33 |
| Counterbalance | CSP-31 |
| Council's Judgment | CNS-16 |
| Council Guardian | CNS-15 |
| Costly Plunder | XLN-96 |
| Cosmotronic Wave | GRN-95 |
| Cosmos Elixir | KHM-237 |
| Cosima, God of the Voyage // The Omenkeel | KHM-50 |
| Corrupted Conscience | MBS-22 |
| Corrupt | USG-124 |
| Corpsejack Menace | IMA-197 |
| Corpsehatch | DDP-50 |
| Corpse Harvester | LGN-62 |
| Corpse Connoisseur | ALA-68 |
| Corpse Augur | C15-17 |
| Coralhelm Guide | BBD-116 |
| Coral Trickster | DDN-44 |
| Copy | TOTJ-1 |
| Copy | LCI-1 |
| Copper Carapace | MM2-205 |
| Convulsing Licid | STH-77 |
| Convolute | EMN-53 |
| Conviction | AER-12 |
| Contradict | DTK-49 |
| Contraband Livestock | CLB-12 |
| Contraband Kingpin | KLD-177 |
| Contingency Plan | EMN-52 |
| Contamination | USG-123 |
| Containment Membrane | OGW-52 |
| Containment Construct | NEO-243 |
| Contagion Engine | SOM-145 |
| Contagion Clasp | SOM-144 |
| Consuming Aberration | GK1-10 |
| Consume Spirit | DDC-56 |
| Consulate Dreadnought | AER-146 |
| Consul's Lieutenant | ORI-11 |
| Constricting Sliver | M15-7 |
| Conspiracy | TSB-39 |
| Conspicuous Snoop | M21-139 |
| Consign // Oblivion | HOU-149 |
| Conifer Strider | DTK-179 |
| Congregate | M15-6 |