| Name | Cost | Price |
|---|---|---|
| Orvar, the All-Form | $3.72 | |
| Orysa, Tide Choreographer | $0.18 | |
| Orzhov Advokist | $0.22 | |
| Orzhov Basilica | $0.23 | |
| Orzhov Cluestone | $0.17 | |
| Orzhov Euthanist | $0.08 | |
| Orzhov Guildgate | $0.23 | |
| Orzhov Guildmage | $0.23 | |
| Orzhov Locket | $0.35 | |
| Orzhov Pontiff | $0.12 | |
| Orzhov Racketeers | $0.03 | |
| Orzhov Signet | $0.31 | |
| Osai Vultures | — | |
| Oscorp Industries | $2.00 | |
| Osseous Exhale | $0.06 | |
| Osseous Sticktwister | $0.27 | |
| Ossification | $0.21 | |
| Osteomancer Adept | $0.62 | |
| Ostiary Thrull | $0.04 | |
| Oswald Fiddlebender | — | |
| Otawara, Soaring City | $27.47 | |
| Oteclan Landmark // Oteclan Levitator | $0.15 | |
| Otepec Huntmaster | $0.36 | |
| Otharri, Suns' Glory | $8.89 |