| Secret PlansCommander 2019 · 201 | Commander 2019 | 201 | Uncommon | €0.16 |
| Secret PlansKhans of Tarkir · 198 | Khans of Tarkir | 198 | Uncommon | €0.12 |
| Secret PlansKhans of Tarkir · 198y | Khans of Tarkir | 198y | Uncommon | — |
| Secret RendezvousBloomburrow Commander · 152 | Bloomburrow Commander | 152 | Uncommon | $0.23 |
| Secret RendezvousFinal Fantasy Commander · 217 | Final Fantasy Commander | 217 | Uncommon | $4.03 |
| Secret RendezvousFinal Fantasy Commander · 218 | Final Fantasy Commander | 218 | Uncommon | €6.50 |
| Secret RendezvousFinal Fantasy Commander · 219 | Final Fantasy Commander | 219 | Uncommon | €2.13 |
| Secret RendezvousFinal Fantasy Commander · 253 | Final Fantasy Commander | 253 | Uncommon | €0.25 |
| Secret RendezvousSecrets of Strixhaven Commander · 166 | Secrets of Strixhaven Commander | 166 | Uncommon | €0.20 |
| Secret RendezvousStrixhaven: School of Mages · 26 | Strixhaven: School of Mages | 26 | Uncommon | €0.13 |
| Secret RendezvousFoundations Commander · 45 | Foundations Commander | 45 | Uncommon | €0.15 |
| Secret RendezvousThe List Tokens · STX-26 | The List Tokens | STX-26 | Uncommon | — |
| Secrets of the DeadCommander 2019 · 95 | Commander 2019 | 95 | Uncommon | $0.44 |
| Secrets of the DeadDark Ascension · 48 | Dark Ascension | 48 | Uncommon | €0.45 |
| Secret SummoningConspiracy · 9 | Conspiracy | 9 | Uncommon | €0.16 |
| Secure DetentionMarvel Super Heroes Commander · 608 | Marvel Super Heroes Commander | 608 | Uncommon | €0.12 |
| Security BlockadeReturn to Ravnica · 20 | Return to Ravnica | 20 | Uncommon | €0.06 |
| Security RhoxStreets of New Capenna · 220 | Streets of New Capenna | 220 | Uncommon | €0.04 |
| Sedraxis SpecterDouble Masters 2022 · 273 | Double Masters 2022 | 273 | Uncommon | $0.10 |
| Sedraxis SpecterModern Masters 2017 · 181 | Modern Masters 2017 | 181 | Uncommon | €0.09 |
| Sedraxis SpecterThe List Tokens · MM3-181 | The List Tokens | MM3-181 | Uncommon | €0.15 |
| Seedcradle WitchShadowmoor · 241 | Shadowmoor | 241 | Uncommon | €0.36 |
| Seedglaive MentorBloomburrow · 231 | Bloomburrow | 231 | Uncommon | €0.18 |
| Seed GuardianOath of the Gatewatch · 143 | Oath of the Gatewatch | 143 | Uncommon | $0.05 |
| Seed GuardianPioneer Masters · 193 | Pioneer Masters | 193 | Uncommon | — |
| Seedguide AshLorwyn · 235 | Lorwyn | 235 | Uncommon | €1.72 |
| Seedguide AshThe List Tokens · LRW-235 | The List Tokens | LRW-235 | Uncommon | $0.84 |
| Seedpod CaretakerMarch of the Machine · 325 | March of the Machine | 325 | Uncommon | €0.20 |
| Seedship AgrarianEdge of Eternities · 204 | Edge of Eternities | 204 | Uncommon | €0.12 |
| Seedship BroodtenderEdge of Eternities · 227 | Edge of Eternities | 227 | Uncommon | €0.15 |
| Seedship ImpactEdge of Eternities · 205 | Edge of Eternities | 205 | Uncommon | €0.09 |
| Seed SparkSalvat 2005 · J40 | Salvat 2005 | J40 | Uncommon | €0.16 |
| Seed SparkRavnica: City of Guilds · 30 | Ravnica: City of Guilds | 30 | Uncommon | €0.16 |
| SeekerLegends · 35 | Legends | 35 | Uncommon | €1.36 |
| SeekerRenaissance · 19 | Renaissance | 19 | Uncommon | €0.06 |
| Seeker of SlaaneshWarhammer 40,000 Commander · 85 | Warhammer 40,000 Commander | 85 | Uncommon | €0.20 |
| Seeker of SlaaneshWarhammer 40,000 Commander · 85★ | Warhammer 40,000 Commander | 85★ | Uncommon | $0.50 |
| Seeker of the WayMagic Origins Clash Pack · 2 | Magic Origins Clash Pack | 2 | Uncommon | $0.34 |
| Seeker of the WayKhans of Tarkir · 22 | Khans of Tarkir | 22 | Uncommon | €0.11 |
| Seeker of the WayThe List Tokens · KTK-22 | The List Tokens | KTK-22 | Uncommon | €0.09 |
| Seeker of the WayMagic Online Promos · 57576 | Magic Online Promos | 57576 | Uncommon | — |
| Seeker's FollyFoundations · 69 | Foundations | 69 | Uncommon | €0.11 |
| Seekers' SquireIxalan · 121 | Ixalan | 121 | Uncommon | €0.04 |
| Seek New KnowledgeAlchemy Horizons: Baldur's Gate · 36 | Alchemy Horizons: Baldur's Gate | 36 | Uncommon | — |
| Seek the HorizonDuel Decks: Nissa vs. Ob Nixilis Tokens · 20 | Duel Decks: Nissa vs. Ob Nixilis Tokens | 20 | Uncommon | €0.12 |
| Seek the HorizonKhans of Tarkir · 150 | Khans of Tarkir | 150 | Uncommon | €0.04 |
| Seek the HorizonThe List Tokens · DDR-20 | The List Tokens | DDR-20 | Uncommon | €0.16 |
| Seek the HorizonReturn to Ravnica · 134 | Return to Ravnica | 134 | Uncommon | €0.06 |
| Seek the HorizonSaviors of Kamigawa · 147 | Saviors of Kamigawa | 147 | Uncommon | €0.19 |
| See RedRivals of Ixalan · 112 | Rivals of Ixalan | 112 | Uncommon | $0.07 |