| Name | Cost | Price |
|---|---|---|
| Oracle's Vault | $0.28 | |
| Orah, Skyclave Hierophant | $0.31 | |
| Oran-Rief Hydra | $0.58 | |
| Oran-Rief Invoker | $0.02 | |
| Oran-Rief Ooze | $0.47 | |
| Oran-Rief Recluse | $0.13 | |
| Oran-Rief Survivalist | $0.12 | |
| Oran-Rief, the Vastwood | $0.71 | |
| Orator of Ojutai | $0.22 | |
| Orazca Frillback | $0.20 | |
| Orazca Puzzle-Door | $0.15 | |
| Orbital Plunge | $0.11 | |
| Orb of Dragonkind | $1.09 | |
| Orb of Origin | $0.17 | |
| Orbweaver Kumo | $0.10 | |
| Orca, Siege Demon | — | |
| Orchard Spirit | $0.13 | |
| Orchard Strider | $0.20 | |
| Orcish Artillery | $0.08 | |
| Orcish Bowmasters | — | |
| Orcish Cannonade | $0.05 | |
| Orcish Conscripts | $0.11 | |
| Orcish Healer | $0.40 | |
| Orcish Hellraiser | $0.09 |