| Card name : | Sewer Rats | Mana Cost : | | Types : | Creature - Rat | Card Text : | , Pay 1 life: Sewer Rats gets +1/+0 until end of turn. Play this ability no more than three times each turn. | P/T : | 1 / 1 | Expansion : | Mirage | Rarity : | Common |
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| Card name : | Shadow Guildmage | Mana Cost : | | Types : | Creature - Human Wizard | Card Text : | , Put target creature you control on top of its owner's library.
, Shadow Guildmage deals 1 damage to target creature or player and 1 damage to you. | P/T : | 1 / 1 | Expansion : | Mirage | Rarity : | Common |
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| Card name : | Shadowbane | Mana Cost : |  | Types : | Instant | Card Text : | The next time a source of your choice would deal damage to you or a creature you control this turn, prevent that damage. If damage from a black source is prevented this way, you gain life equal to the damage prevented this way. | | | Expansion : | Mirage | Rarity : | Uncommon |
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| Card name : | Shallow Grave | Mana Cost : |  | Types : | Instant | Card Text : | Return the top creature card from your graveyard to play. That creature gains haste until end of turn. Remove it from the game at end of turn. | | | Expansion : | Mirage | Rarity : | Rare |
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| Card name : | Shaper Guildmage | Mana Cost : | | Types : | Creature - Human Wizard | Card Text : | , Target creature gains first strike until end of turn.
, Target creature gets +1/+0 until end of turn. | P/T : | 1 / 1 | Expansion : | Mirage | Rarity : | Common |
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| Card name : | Shauku's Minion | Mana Cost : |   | Types : | Creature - Human Minion | Card Text : |  , Shauku's Minion deals 2 damage to target white creature. | P/T : | 2 / 2 | Expansion : | Mirage | Rarity : | Uncommon |
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| Card name : | Shauku, Endbringer | Mana Cost : |   | Types : | Legendary Creature - Vampire | Card Text : | Flying Shauku, Endbringer can't attack if there's another creature in play. At the beginning of your upkeep, you lose 3 life.
Remove target creature from the game and put a +1/+1 counter on Shauku. | P/T : | 5 / 5 | Expansion : | Mirage | Rarity : | Rare |
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| Card name : | Shimmer | Mana Cost : |   | Types : | Enchantment | Card Text : | As Shimmer comes into play, choose a land type. All lands of the chosen type have phasing. | | | Expansion : | Mirage | Rarity : | Rare |
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| Card name : | Sidar Jabari | Mana Cost : |  | Types : | Legendary Creature - Human Knight | Card Text : | Flanking (Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.) Whenever Sidar Jabari attacks, tap target creature defending player controls. | P/T : | 2 / 2 | Expansion : | Mirage | Rarity : | Rare |
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| Card name : | Sirocco | Mana Cost : |  | Types : | Instant | Card Text : | Target player reveals his or her hand. For each blue instant card revealed, he or she pays 4 life or discards that card. | | | Expansion : | Mirage | Rarity : | Uncommon |
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| Card name : | Skulking Ghost | Mana Cost : |  | Types : | Creature - Spirit | Card Text : | Flying When Skulking Ghost becomes the target of a spell or ability, sacrifice it. | P/T : | 2 / 1 | Expansion : | Mirage | Rarity : | Common |
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| Card name : | Sky Diamond | Mana Cost : | | Types : | Artifact | Card Text : | Sky Diamond comes into play tapped.
Add to your mana pool. | | | Expansion : | Mirage | Rarity : | Uncommon |
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| Card name : | Soar | Mana Cost : |  | Types : | Enchantment - Aura | Card Text : | You may play Soar any time you could play an instant. If it was played any time a sorcery couldn't have been played, it gains substance until end of turn and when it loses substance, sacrifice it. Enchant creature Enchanted creature gets +0/+1 and has flying. | | | Expansion : | Mirage | Rarity : | Common |
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| Card name : | Soul Echo | Mana Cost : |   | Types : | Enchantment | Card Text : | Soul Echo comes into play with X echo counters on it. You don't lose the game for having 0 or less life. At the beginning of your upkeep, sacrifice Soul Echo if there are no echo counters on it. Otherwise, an opponent may choose that for each 1 damage that would be dealt to you until your next upkeep, you remove 1 echo counter from Soul Echo instead. | | | Expansion : | Mirage | Rarity : | Rare |
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| Card name : | Soul Rend | Mana Cost : |  | Types : | Instant | Card Text : | Destroy target creature if it's white. A creature destroyed this way can't be regenerated. Draw a card at the beginning of the next turn's upkeep. | | | Expansion : | Mirage | Rarity : | Uncommon |
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| Card name : | Soulshriek | Mana Cost : | | Types : | Instant | Card Text : | Target creature you control gets +X/+0 until end of turn, where X is the number of creature cards in your graveyard. Sacrifice that creature at end of turn. | | | Expansion : | Mirage | Rarity : | Common |
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| Card name : | Spatial Binding | Mana Cost : |  | Types : | Enchantment | Card Text : | Pay 1 life: Until your next upkeep step, target permanent can't phase out. | | | Expansion : | Mirage | Rarity : | Uncommon |
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| Card name : | Spectral Guardian | Mana Cost : |   | Types : | Creature - Spirit | Card Text : | Noncreature artifacts have shroud as long as Spectral Guardian is untapped. (They can't be the targets of spells or abilities.) | P/T : | 2 / 3 | Expansion : | Mirage | Rarity : | Rare |
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| Card name : | Spirit of the Night | Mana Cost : |    | Types : | Legendary Creature - Demon Spirit | Card Text : | Flying, trample, haste, protection from black Whenever Spirit of the Night attacks, it gains first strike until end of combat. | P/T : | 6 / 5 | Expansion : | Mirage | Rarity : | Rare |
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| Card name : | Spitting Earth | Mana Cost : |  | Types : | Sorcery | Card Text : | Spitting Earth deals damage equal to the number of Mountains you control to target creature. | | | Expansion : | Mirage | Rarity : | Common |
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| Card name : | Stalking Tiger | Mana Cost : |  | Types : | Creature - Cat | Card Text : | Stalking Tiger can't be blocked by more than one creature. | P/T : | 3 / 3 | Expansion : | Mirage | Rarity : | Common |
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| Card name : | Stone Rain | Mana Cost : |  | Types : | Sorcery | Card Text : | Destroy target land. | | | Expansion : | Mirage | Rarity : | Common |
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| Card name : | Stupor | Mana Cost : |  | Types : | Sorcery | Card Text : | Target opponent discards a card at random, then discards a card. | | | Expansion : | Mirage | Rarity : | Uncommon |
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| Card name : | Subterranean Spirit | Mana Cost : |   | Types : | Creature - Elemental Spirit | Card Text : | Protection from red
Subterranean Spirit deals 1 damage to each creature without flying. | P/T : | 3 / 3 | Expansion : | Mirage | Rarity : | Rare |
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| Card name : | Sunweb | Mana Cost : |  | Types : | Creature - Wall | Card Text : | Defender (This creature can't attack.) Flying Sunweb can't block creatures with power 2 or less. | P/T : | 5 / 6 | Expansion : | Mirage | Rarity : | Rare |
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