| Sanctum Custodian (10 variants) | 42 |
| Sanctum Guardian (10 variants) | 43 |
| Sandbar Merfolk (10 variants) | 94 |
| Sandbar Serpent (10 variants) | 95 |
| Sanguine Guard (10 variants) | 155 |
| Scald (10 variants) | 211 |
| Scoria Wurm (10 variants) | 212 |
| Scrap (10 variants) | 213 |
| Seasoned Marshal (10 variants) | 44 |
| Serra Avatar (10 variants) | 45 |
| Serra Zealot (10 variants) | 46 |
| Serra's Embrace (10 variants) | 47 |
| Serra's Hymn (10 variants) | 48 |
| Serra's Liturgy (10 variants) | 49 |
| Serra's Sanctum (10 variants) | 325 |
| Shimmering Barrier (10 variants) | 50 |
| Shiv's Embrace (10 variants) | 216 |
| Shivan Gorge (10 variants) | 326 |
| Shivan Hellkite (10 variants) | 214 |
| Shivan Raptor (10 variants) | 215 |
| Show and Tell (10 variants) | 96 |
| Shower of Sparks (10 variants) | 217 |
| Sicken (10 variants) | 156 |
| Silent Attendant (10 variants) | 51 |
| Skirge Familiar (10 variants) | 157 |
| Skittering Skirge (10 variants) | 158 |
| Sleeper Agent (10 variants) | 159 |
| Slippery Karst (10 variants) | 327 |
| Smokestack (10 variants) | 309 |
| Smoldering Crater (10 variants) | 328 |
| Sneak Attack (10 variants) | 218 |
| Somnophore (10 variants) | 97 |
| Songstitcher (10 variants) | 52 |
| Soul Sculptor (10 variants) | 53 |
| Spined Fluke (10 variants) | 160 |
| Spire Owl (10 variants) | 98 |
| Sporogenesis (10 variants) | 273 |
| Spreading Algae (10 variants) | 274 |
| Steam Blast (10 variants) | 219 |
| Stern Proctor (10 variants) | 99 |
| Stroke of Genius (10 variants) | 100 |
| Sulfuric Vapors (10 variants) | 220 |
| Sunder (10 variants) | 101 |
| Swamp (10 variants) | 339 |
| Swamp (10 variants) | 340 |
| Swamp (10 variants) | 341 |
| Swamp (10 variants) | 342 |
| Symbiosis (10 variants) | 275 |
| Tainted Aether (10 variants) | 161 |
| Telepathy (10 variants) | 102 |