Counter target instant or sorcery spell. Its controller reveals cards from the top of their library until they reveal an instant or sorcery card. That player may cast that card without paying its mana cost. Then the player shuffles.

Flash

Flying

When Spellstutter Sprite enters the battlefield, counter target spell with mana value X or less, where X is the number of Faeries you control.

Exile target instant or sorcery card from your graveyard and target instant or sorcery card from an opponent's graveyard. Copy those cards. Cast the copies if able without paying their mana costs. Exile Spelltwine.

Enchant instant card in a graveyard

Whenever you cast a sorcery spell, copy the enchanted instant card. You may cast the copy without paying its mana cost. If you do, exile the enchanted card and attach Spellweaver Volute to another instant card in a graveyard.

If a green source would deal damage to you, prevent 2 of that damage.

Spells cost more to cast.

Sphere of the Suns enters the battlefield tapped and with three charge counters on it.

, Remove a charge counter from Sphere of the Suns: Add one mana of any color.

Flying

When Sphinx of Enlightenment enters the battlefield, target opponent draws a card and you draw three cards.

Kicker (You may pay an additional as you cast this spell.)

Flying

When Sphinx of Lost Truths enters the battlefield, draw three cards. Then if it wasn't kicked, discard three cards.

This spell can't be countered.

Flying, hexproof

Instant and sorcery spells you control can't be countered.

Flying

At the beginning of your postcombat main phase, there is an additional beginning phase after this phase. (The beginning phase includes the untap, upkeep, and draw steps.)

Flying

When Sphinx of Uthuun enters the battlefield, reveal the top five cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other into your graveyard.

You gain X life and draw X cards.

Equipped creature gets +0/+2 and has reach. (It can block creatures with flying.)

Equip (: Attach to target creature you control. Equip only as a sorcery.)

Spike Hatcher enters the battlefield with six +1/+1 counters on it.

, Remove a +1/+1 counter from Spike Hatcher: Put a +1/+1 counter on target creature.

, Remove a +1/+1 counter from Spike Hatcher: Regenerate Spike Hatcher.

Spike Tiller enters the battlefield with three +1/+1 counters on it.

, Remove a +1/+1 counter from Spike Tiller: Put a +1/+1 counter on target creature.

, Remove a +1/+1 counter from Spike Tiller: Target land becomes a 2/2 creature that's still a land. Put a +1/+1 counter on it.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

: Spikeshot Elder deals damage equal to its power to any target.

Flying

Sacrifice Spiketail Drake: Counter target spell unless its controller pays .

Flying (This creature can't be blocked except by creatures with flying or reach.)

Sacrifice Spiketail Hatchling: Counter target spell unless its controller pays .

Spectacle (You may cast this spell for its spectacle cost rather than its mana cost if an opponent lost life this turn.)

When Spinal Centipede dies, put a +1/+1 counter on target creature you control.

Sunburst (This enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it.)

Remove two +1/+1 counters from Spinal Parasite: Remove a counter from target permanent.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

You may have Spinebiter assign its combat damage as though it weren't blocked.

As long as you've drawn two or more cards this turn, Spinehorn Minotaur has double strike.

All Sliver creatures have reach.

: Regenerate Spiny Starfish.

At the beginning of each end step, if Spiny Starfish regenerated this turn, create a 0/1 blue Starfish creature token for each time it regenerated this turn.

Flash (You may cast this spell any time you could cast an instant.)

Flying

Flying

When Spire Patrol enters the battlefield, tap target creature an opponent controls. That creature doesn't untap during its controller's next untap step.

Defender

Metalcraft — As long as you control three or more artifacts, Spire Serpent gets +2/+2 and can attack as though it didn't have defender.

Whenever Spireside Infiltrator becomes tapped, it deals 1 damage to each opponent.

Enchant creature

You control enchanted creature.

Enchanted creature gets +2/+2 and has flying.

Whenever a player discards a card, you may pay . If you do, create a 1/1 white Spirit creature token with flying.

Flying

: The next 1 damage that would be dealt to Spirit en-Kor this turn is dealt to target creature you control instead.

Enchant creature (Target a creature as you cast this. This card enters the battlefield attached to that creature.)

Whenever enchanted creature deals damage, you gain that much life.

Enchant creature

Enchanted creature gets +1/+1 and has protection from creatures.

When Spirit of Malevolence dies, each opponent loses 1 life and you gain 1 life.

When Spirit of the Aldergard enters the battlefield, search your library for a snow land card, reveal it, put it into your hand, then shuffle.

Spirit of the Aldergard gets +1/+0 for each other snow permanent you control.

Flash

When Spirit of the Hunt enters the battlefield, each other creature you control that's a Wolf or a Werewolf gets +0/+3 until end of turn.

Flying, trample, haste, protection from black

Spirit of the Night has first strike as long as it's attacking.

Flying

Other creatures you control with flying get +0/+1.

You may choose not to untap Spirit Shield during your untap step.

, : Target creature gets +0/+2 for as long as Spirit Shield remains tapped.

: Target green or blue creature gets +0/+1 until end of turn.

Whenever Spiritmonger deals damage to a creature, put a +1/+1 counter on Spiritmonger.

: Regenerate Spiritmonger.

: Spiritmonger becomes the color of your choice until end of turn.

Creatures and lands you control have shroud. (They can't be the targets of spells or abilities.)

When a creature you control attacks, sacrifice Spiritual Asylum.

When Spiritual Guardian enters the battlefield, you gain 4 life.

Create a 1/1 colorless Spirit creature token.

Splice onto Arcane (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)

Spit Flame deals 4 damage to target creature.

Whenever a Dragon enters the battlefield under your control, you may pay . If you do, return Spit Flame from your graveyard to your hand.

Spite of Mogis deals damage to target creature equal to the number of instant and sorcery cards in your graveyard. Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

: Each player loses 1 life.