| Spirit Link | 45★ |
| Spirit Link (9 variants) | 45 |
| Spineless Thug (18 variants) | 180 |
| Spined Wurm (18 variants) | 298 |
| Spiketail Hatchling | 111★ |
| Spiketail Hatchling (9 variants) | 111 |
| Spellbook (18 variants) | 343 |
| Spawning Pool | 358★ |
| Spawning Pool (9 variants) | 358 |
| Spark Elemental (9 variants) | 237 |
| Spark Elemental | 237★ |
| Soulblast (18 variants) | 236 |
| Soul Warden (18 variants) | 44 |
| Soul Feast (18 variants) | 179 |
| Snapping Drake | 110★ |
| Snapping Drake (9 variants) | 110 |
| Smash (18 variants) | 235 |
| Sleeper Agent (18 variants) | 178 |
| Skyshroud Ranger (18 variants) | 297 |
| Skyhunter Skirmisher (9 variants) | 43 |
| Skyhunter Skirmisher | 43★ |
| Skyhunter Prowler | 42★ |
| Skyhunter Prowler (9 variants) | 42 |
| Skyhunter Patrol (9 variants) | 41 |
| Skyhunter Patrol | 41★ |
| Sky Weaver (9 variants) | 109 |
| Sky Weaver | 109★ |
| Sift (18 variants) | 108 |
| Siege-Gang Commander (18 variants) | 234 |
| Shunt (18 variants) | 233 |
| Shock (18 variants) | 232 |
| Shivan Reef (18 variants) | 357 |
| Shivan Hellkite | 231★ |
| Shivan Hellkite (9 variants) | 231 |
| Shivan Dragon (9 variants) | 230 |
| Shivan Dragon | 230★ |
| Shimmering Wings | 107★ |
| Shimmering Wings (9 variants) | 107 |
| Shatterstorm (18 variants) | 229 |
| Severed Legion (9 variants) | 177 |
| Severed Legion | 177★ |
| Serra's Embrace | 40★ |
| Serra's Embrace (9 variants) | 40 |
| Serra Angel | 39★ |
| Serra Angel (9 variants) | 39 |
| Sengir Vampire | 176★ |
| Sengir Vampire (9 variants) | 176 |
| Seismic Assault (18 variants) | 228 |
| Seedborn Muse (18 variants) | 296 |
| Sea Monster (18 variants) | 106 |