| Swamp (22 variants) | 370 |
| Sudden Breakthrough (22 variants) | 116 |
| Study Break (22 variants) | 34 |
| Strixhaven Stadium (22 variants) | 259 |
| Strixhaven Stadium (12 variants) | 358 |
| Strict Proctor | 33★ |
| Strict Proctor (22 variants) | 33 |
| Strict Proctor (12 variants) | 294 |
| Storm-Kiln Artist (22 variants) | 115 |
| Stonerise Spirit (22 variants) | 32 |
| Stonebound Mentor (22 variants) | 239 |
| Stonebinder's Familiar (22 variants) | 31 |
| Start from Scratch (22 variants) | 114 |
| Star Pupil (22 variants) | 30 |
| Square Up (22 variants) | 238 |
| Springmane Cervin (22 variants) | 144 |
| Spiteful Squad (22 variants) | 237 |
| Spirit Summoning (22 variants) | 236 |
| Spined Karok (22 variants) | 143 |
| Spell Satchel (22 variants) | 258 |
| Specter of the Fens (22 variants) | 87 |
| Spectacle Mage (22 variants) | 235 |
| Sparring Regimen (22 variants) | 29 |
| Sparring Regimen (12 variants) | 293 |
| Soothsayer Adept (22 variants) | 55 |
| Solve the Equation (22 variants) | 54 |
| Snow Day (22 variants) | 53 |
| Silverquill Silencer (12 variants) | 353 |
| Silverquill Silencer (22 variants) | 234 |
| Silverquill Pledgemage (22 variants) | 233 |
| Silverquill Command (12 variants) | 352 |
| Silverquill Command (22 variants) | 232 |
| Silverquill Campus (22 variants) | 273 |
| Silverquill Apprentice (22 variants) | 231 |
| Show of Confidence (22 variants) | 28 |
| Shineshadow Snarl (12 variants) | 364 |
| Shineshadow Snarl (22 variants) | 272 |
| Shaile, Dean of Radiance // Embrose, Dean of Shadow (22 variants) | 158 |
| Shaile, Dean of Radiance // Embrose, Dean of Shadow (2 variants) | 330 |
| Shadrix Silverquill (22 variants) | 230 |
| Shadrix Silverquill (22 variants) | 280 |
| Shadewing Laureate (22 variants) | 229 |
| Serpentine Curve (22 variants) | 52 |
| Semester's End (12 variants) | 292 |
| Semester's End (22 variants) | 27 |
| Selfless Glyphweaver // Deadly Vanity (22 variants) | 157 |
| Selfless Glyphweaver // Deadly Vanity (2 variants) | 329 |
| Sedgemoor Witch (22 variants) | 86 |
| Sedgemoor Witch (12 variants) | 306 |
| Secret Rendezvous (22 variants) | 26 |