Spelleater Wolverine has double strike as long as there are three or more instant and/or sorcery cards in your graveyard.

Whenever you cast a noncreature spell, put a +1/+1 counter on Spellgorger Weird.

Flying

When Spellpyre Phoenix enters, you may return target instant or sorcery card with a cycling ability from your graveyard to your hand.

At the beginning of each end step, if you cycled two or more cards this turn, return Spellpyre Phoenix from your graveyard to your hand.

Flying

When Spellscorn Coven enters, each opponent discards a card.

Whenever an opponent casts a spell, that player sacrifices a permanent of their choice unless they pay .

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.

Sphere of Annihilation enters with X void counters on it.

At the beginning of your upkeep, exile Sphere of Annihilation, all creatures and planeswalkers with mana value less than or equal to the number of void counters on it, and all creature and planeswalker cards in graveyards with mana value less than or equal to the number of void counters on it.

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

If an artifact would deal damage to you, prevent 1 of that damage.

Spells cost more to cast.

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

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

Flying

Whenever Sphinx Ambassador deals combat damage to a player, search that player's library for a card, then that player chooses a card name. If you searched for a creature card that doesn't have that name, you may put it onto the battlefield under your control. Then that player shuffles.

Flying

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

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

Flying

Whenever this creature attacks, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to that card's mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

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

Flying

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

Flying, vigilance

Spells your opponents cast that target Sphinx of New Prahv cost more to cast.

This spell can't be countered.

Flying

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

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

Flying, lifelink

Whenever you gain life, you get that many (energy counters).

, , Pay X : Draw X cards.

Flying, first strike, vigilance, lifelink, protection from red and from green

Flying

At the beginning of your end step, you gain 3 life if Sphinx Sovereign is untapped. Otherwise, each opponent loses 3 life.

Whenever you cast an instant or sorcery spell, you may put a charge counter on Sphinx-Bone Wand. If you do, Sphinx-Bone Wand deals damage equal to the number of charge counters on it to any target.

Destroy up to one target artifact, enchantment, or creature with flying. Create a Food token. (It's an artifact with ", , Sacrifice this artifact: You gain 3 life.")

When Spiderwig Boggart enters, target creature gains fear until end of turn. (It can't be blocked except by artifact creatures and/or black creatures.)

Spike Drone enters with a +1/+1 counter on it.

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

Spike Soldier enters with three +1/+1 counters on it.

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

Remove a +1/+1 counter from Spike Soldier: Spike Soldier gets +2/+2 until end of turn.

( can be paid with either or 2 life.)

: Reveal a card you own from outside the game that has been banned or restricted in a Constructed format and put it into your hand.

When you unlock this door, create three 1/1 red Devil creature tokens with "When this creature dies, it deals 1 damage to any target."

(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

, : Spikeshot Goblin deals damage equal to its power to any target.

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

When Spine of Ish Sah enters, destroy target permanent.

When Spine of Ish Sah is put into a graveyard from the battlefield, return Spine of Ish Sah to its owner's hand.

Hexproof (This creature can't be the target of spells or abilities your opponents control.)

Whenever Spined Megalodon attacks, scry 1. (Look at the top card of your library. You may put that card on the bottom.)

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

Reach

Ward (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)

, Discard Spinewoods Armadillo: Search your library for a basic land card or a Desert card, reveal it, put it into your hand, then shuffle. You gain 3 life.

Reach

Whenever another nontoken creature you control dies, you may reveal cards from the top of your library until you reveal a creature card. Put that card into your hand and the rest on the bottom of your library in a random order.

Affinity for Islands (This spell costs less to cast for each Island you control.)

Flying

: Add .

, Pay 1 life: Add one mana of any color. Activate only if you control an artifact.

Flying

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

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

Flying

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

At the beginning of your upkeep, if there are no Reflection tokens on the battlefield, create a 2/2 white Reflection creature token.

: Destroy target Reflection.

As long as you control a permanent of each color, prevent all damage that would be dealt to you.

Flying

You have hexproof. (You can't be the target of spells or abilities your opponents control.)

Each player can't draw more than one card each turn.

When Spirit of the Season enters, it gains haste if it's summer. Put a +1/+1 counter on it if it's autumn. You gain 5 life if it's winter. If it's spring, search your library for a basic land card, reveal it, put it into your hand, then shuffle.

Create a 3/2 red and white Spirit creature token.

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.

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.)

Destroy target creature and target land.

Spiteful Repossession deals damage to each opponent who controls more lands than you equal to the difference. Then create a number of Treasure tokens equal to the damage dealt this way.

At the beginning of each player's draw step, that player draws an additional card.

Whenever a player draws a card, Spiteful Visions deals 1 damage to that player.