| Name | Cost | Price |
|---|---|---|
| Okiba Reckoner Raid // Nezumi Road Captain | $0.21 | |
| Okina Nightwatch | $0.14 | |
| Okk | $0.34 | |
| Oko, Lorwyn Liege // Oko, Shadowmoor Scion | $0.76 | |
| Oko, the Ringleader | $0.46 | |
| Oko, Thief of Crowns | $4.68 | |
| Okoye, Dora Milaje Leader | $0.24 | |
| Okoye, Mighty and Adored | $0.26 | |
| Ol' Buzzbark | $0.43 | |
| Old Fogey | — | |
| Old Gnawbone | $51.75 | |
| Old-Growth Dryads | $0.24 | |
| Old-Growth Troll | $0.64 | |
| Old Hob, Alleycat Blues | $0.12 | |
| Old Man Willow | $0.17 | |
| Old One Eye | — | |
| Old Rutstein | $1.05 | |
| Old Stickfingers | $0.46 | |
| Old Way Phyrexian | — | |
| Oliphaunt | $1.12 | |
| Olivia, Crimson Bride | $6.78 | |
| Olivia, Mobilized for War | $11.64 | |
| Olivia, Opulent Outlaw | $5.77 | |
| Olivia's Attendants | $0.44 |