| Piper of the Swarm (22 variants) | 100 |
| Piper of the Swarm (2 variants) | 355 |
| Overwhelmed Apprentice (22 variants) | 60 |
| Outmuscle (22 variants) | 170 |
| Outlaws' Merriment (22 variants) | 198 |
| Outlaws' Merriment (2 variants) | 382 |
| Outflank (22 variants) | 23 |
| Order of Midnight // Alter Fate (22 variants) | 99 |
| Order of Midnight // Alter Fate (2 variants) | 288 |
| Opt (22 variants) | 59 |
| Opportunistic Dragon (22 variants) | 133 |
| Opportunistic Dragon (2 variants) | 364 |
| Once Upon a Time (22 variants) | 169 |
| Once Upon a Time (2 variants) | 371 |
| Once and Future (22 variants) | 168 |
| Oko's Hospitality (11 variants) | 312 |
| Oko's Accomplices (11 variants) | 310 |
| Oko, Thief of Crowns (2 variants) | 271 |
| Oko, Thief of Crowns (22 variants) | 197 |
| Oko, the Trickster (22 variants) | 309 |
| Ogre Errant (22 variants) | 132 |
| Oathsworn Knight (2 variants) | 354 |
| Oathsworn Knight (22 variants) | 98 |
| Oakhame Ranger // Bring Back (22 variants) | 212 |
| Oakhame Ranger // Bring Back (2 variants) | 302 |
| Oakhame Adversary (22 variants) | 167 |
| Mystical Dispute (22 variants) | 58 |
| Mystic Sanctuary (22 variants) | 247 |
| Mysterious Pathlighter (22 variants) | 22 |
| Murderous Rider // Swift End (2 variants) | 287 |
| Murderous Rider // Swift End (22 variants) | 97 |
| Mountain (22 variants) | 264 |
| Mountain (22 variants) | 265 |
| Mountain (22 variants) | 263 |
| Mountain (22 variants) | 262 |
| Moonlit Scavengers (22 variants) | 57 |
| Mistford River Turtle (22 variants) | 56 |
| Mirrormade (2 variants) | 347 |
| Mirrormade (22 variants) | 55 |
| Midnight Clock (22 variants) | 54 |
| Midnight Clock (2 variants) | 346 |
| Merfolk Secretkeeper // Venture Deeper (22 variants) | 53 |
| Merfolk Secretkeeper // Venture Deeper (2 variants) | 284 |
| Merchant of the Vale // Haggle (2 variants) | 293 |
| Merchant of the Vale // Haggle (22 variants) | 131 |
| Memory Theft (22 variants) | 96 |
| Maraleaf Rider (22 variants) | 166 |
| Maraleaf Pixie (22 variants) | 196 |
| Mantle of Tides (22 variants) | 52 |
| Malevolent Noble (22 variants) | 95 |