Soulhunter Rakshasa can't block.

When Soulhunter Rakshasa enters the battlefield, if you cast it from your hand, it deals 1 damage to target opponent for each Swamp you control.

Permanent cards in graveyards can't enter the battlefield.

Players can't cast noncreature spells from graveyards or exile.

Return target creature card from your graveyard to your hand.

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.)

: You gain 1 life.

, Sacrifice a creature: Draw a card.

Target creature you control deals damage equal to its power to any target.

Draw cards equal to the power of target creature you control.

As an additional cost to cast this spell, discard a card or sacrifice a permanent.

Fathomless descent — Souls of the Lost's power is equal to the number of permanent cards in your graveyard and its toughness is equal to that number plus 1.

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 the beginning of the next end step.

When Soulstinger enters the battlefield, put two -1/-1 counters on target creature you control.

When Soulstinger dies, you may put a -1/-1 counter on target creature for each -1/-1 counter on Soulstinger.

First strike

Soulsurge Elemental's power is equal to the number of creatures you control.

Create a 1/1 green Wolf creature token. It has "This creature gets +1/+1 for each card named Sound the Call in each graveyard."

Whenever you cast a spell with an odd mana value, convert Soundwave. If you do, create Ravage, a legendary 3/3 black Robot artifact creature token with menace and deathtouch.

Whenever you cast a spell with an even mana value, convert Soundwave. If you do, create Laserbeak, a legendary 2/2 blue Robot artifact creature token with flying and hexproof.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Flying

Whenever this creature mutates, gain control of target noncreature artifact.

Ward

Whenever Sovereign Okinec Ahau attacks, for each creature you control with power greater than that creature's base power, put a number of +1/+1 counters on that creature equal to the difference.

When Sovereign's Macuahuitl enters the battlefield, attach it to target creature you control.

Equipped creature gets +2/+0.

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

Flying

As Sower of Discord enters the battlefield, choose two players.

Whenever damage is dealt to one of the chosen players, the other chosen player also loses that much life.

Space sculptor (Space Beleren divides the battlefield into alpha, beta, and gamma sectors. If a creature isn't assigned to a sector, its controller assigns it to one. Opponents assign first.)

+1: Creatures in each sector can be blocked this turn only by creatures in the same sector.

−1: Put a +1/+1 counter on each creature in the sector of your choice.

−5: Destroy all creatures in the sector of your choice.

Squad (As an additional cost to cast this spell, you may pay any number of times. When this creature enters the battlefield, create that many tokens that are copies of it.)

Grav-cannon — When Space Marine Devastator enters the battlefield, destroy up to one target artifact or enchantment.

(: Add , , or .)

Spara's Headquarters enters the battlefield tapped.

Cycling (, Discard this card: Draw a card.)

Creatures you control gain protection from non-Human creatures until end of turn.

You may have Spark Double enter the battlefield as a copy of a creature or planeswalker you control, except it enters with an additional +1/+1 counter on it if it's a creature, it enters with an additional loyalty counter on it if it's a planeswalker, and it isn't legendary.

When Spark Fiend enters the battlefield, roll two six-sided dice. If you rolled 2, 3, or 12, sacrifice Spark Fiend. If you rolled 7 or 11, don't roll dice for Spark Fiend during any of your following upkeeps. If you rolled any other total, note that total.

At the beginning of your upkeep, roll two six-sided dice. If you rolled 7, sacrifice Spark Fiend. If you roll the noted total, don't roll dice for Spark Fiend during any of your following upkeeps. Otherwise, do nothing.

Whenever Spark Mage deals combat damage to a player, you may have Spark Mage deal 1 damage to target creature that player controls.

, Sacrifice a creature or planeswalker: You gain 1 life and draw a card.

Trample, lifelink, haste

At the beginning of the end step, sacrifice Spark Trooper.

As an additional cost to cast this spell, discard a card.

Protection from planeswalkers

: Sparkhunter Masticore deals 1 damage to target planeswalker.

: Sparkhunter Masticore gains indestructible until end of turn.

Sparkmage's Gambit deals 1 damage to each of up to two target creatures. Those creatures can't block this turn.

, , Discard a card: Create a 3/1 red Elemental creature token named Spark Elemental. It has trample, haste, and "At the beginning of the end step, sacrifice Spark Elemental."

Whenever Sparring Golem becomes blocked, it gets +1/+1 until end of turn for each creature blocking it.

As long as it's your turn, Spartan Veteran has first strike. (It deals combat damage before creatures without first strike.)

: Spartan Veteran gets +1/+0 until end of turn.

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

Flying, trample

At the beginning of your upkeep, Spawn of Mayhem deals 1 damage to each player. Then if you have 10 or less life, put a +1/+1 counter on Spawn of Mayhem.

At the beginning of your end step, return up to one target Eldrazi creature card from your graveyard to your hand. Create two 1/1 colorless Eldrazi Scion creature tokens with "Sacrifice this creature: Add ."

When Spawnbroker enters the battlefield, you may exchange control of target creature you control and target creature with power less than or equal to that creature's power an opponent controls.

: Add .

, , Sacrifice Spawning Bed: Create three 1/1 colorless Eldrazi Scion creature tokens. They have "Sacrifice this creature: Add ."

Whenever a Kraken, Leviathan, Octopus, or Serpent you control deals combat damage to a player, create a 9/9 blue Kraken creature token.

Trample

Whenever Spawnwrithe deals combat damage to a player, create a token that's a copy of Spawnwrithe.

Vigilance, lifelink

: Create a 4/4 white Angel creature token with flying. Activate only if you have at least 7 life more than your starting life total and only as a sorcery.

Defender

: Spear Spewer deals 1 damage to each player.

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)

First strike

Enchanted creature gets +2/+2 and has first strike.

As Species Specialist enters the battlefield, choose a creature type.

Whenever a creature of the chosen type dies, you may draw a card.

Flying

Instant and sorcery spells you cast with mana value 5 or greater cost less to cast.

Spectator Seating enters the battlefield tapped unless you have two or more opponents.

: Add or .

Flying

: Target opponent loses 2 life and you gain 2 life.

Equipped creature gets +1/+0.

Whenever equipped creature deals combat damage to a player, that player discards a card.

Equip (: Attach to target creature you control. Equip only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the creature leaves.)

Enchant creature

Enchanted creature gets +2/+2 and has protection from each color. This effect doesn't remove Auras. (It can't be blocked, targeted, or dealt damage by anything that's white, blue, black, red, or green.)

Flying

When Spectral Arcanist enters the battlefield, you may cast an instant or sorcery spell with mana value less than or equal to the number of Spirits you control from a graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.

Enchant creature

Enchanted creature gets -2/-0.

If Spectral Binding would be put into a graveyard from anywhere, exile it instead.

Return each creature your opponents control with toughness X or less to its owner's hand, where X is the number of Islands you control.

Foretell (During your turn, you may pay and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)