Trample

Whenever another nontoken creature you control enters, you may draw a card.

Vigilance

: Creatures you control get +2/+2 and gain first strike and lifelink until end of turn.

, Exile Soul of Theros from your graveyard: Creatures you control get +2/+2 and gain first strike and lifelink until end of turn.

, : Target creature becomes an enchantment and loses all abilities until a player casts a creature spell.

Target player sacrifices a nontoken creature. When they do, you may discard a card. If you do, conjure a duplicate of the sacrificed creature into your hand. It perpetually gains "You may spend mana as though it were mana of any color to cast this spell."

Landfall — Whenever a land you control enters, you may put a quest counter on Soul Stair Expedition.

Remove three quest counters from Soul Stair Expedition and sacrifice it: Return up to two target creature cards from your graveyard to your hand.

Enchant nonland permanent

At the beginning of the upkeep of enchanted permanent's controller, that player sacrifices it unless they pay , where X is its mana value.

Partner with Soulblade Renewer (When this creature enters, target player may put Soulblade Renewer into their hand from their library, then shuffle.)

Deathtouch

Whenever a creature with a +1/+1 counter on it attacks one of your opponents, that creature gains deathtouch until end of turn.

: Target creature gains trample until end of turn. If this is the third time this ability has resolved this turn, you may add .

Whenever a Bird is put into your graveyard from the battlefield, put a feather counter on Soulcatchers' Aerie.

Bird creatures get +1/+1 for each feather counter on Soulcatchers' Aerie.

Lifelink

Instant and sorcery spells you control have lifelink.

: The next time you cast an instant or sorcery spell from your hand this turn, put that card into your hand instead of into your graveyard as it resolves.

Soulhunter Rakshasa can't block.

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

Whenever another creature enters, you may gain 1 life.

Put X +1/+1 counters on target creature, where X is that creature's power.

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.

When Soulstinger enters, 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.

Enchant creature

Enchanted creature gets +1/+1 and has vigilance.

When enchanted creature dies, manifest the top card of your library. (Put it onto the battlefield face down as a 2/2 creature. Turn it face up any time for its mana cost if it's a creature card.)

Soulsworn Spirit can't be blocked.

When Soulsworn Spirit enters, detain target creature an opponent controls. (Until your next turn, that creature can't attack or block and its activated abilities can't be activated.)

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."

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.

Target player loses 3 life and you gain 3 life.

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Whenever a creature you control attacks alone, you may search your library for an Aura card that could enchant that creature, put it onto the battlefield attached to that creature, then shuffle.

Exile target nonbasic land. Search its controller's graveyard, hand, and library for all cards with the same name as that land and exile them. Then that player shuffles.

First strike, vigilance

Concealed Position — When Space Marine Scout enters, if an opponent controls more lands than you, you may search your library for a Plains card, put it onto the battlefield tapped, then shuffle.

(: Add , , or .)

Spara's Headquarters enters tapped.

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

As an additional cost to cast this spell, sacrifice a creature or pay .

Destroy target creature or planeswalker.

Choose target creature. Exile the top card of your library. You may have Spark of Creativity deal damage to that creature equal to the exiled card's mana value. If you don't, you may play that card until end of turn.

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."

When Sparring Construct dies, put a +1/+1 counter on target creature you control.

Pay 1 life: Until your next upkeep, target permanent can't phase out.

, , Sacrifice Spatula of the Ages: You may put a silver-bordered or acorn permanent card from your hand onto the battlefield.

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 ."

Sacrifice a creature: Put a charge counter on Spawning Pit.

, Remove two charge counters from Spawning Pit: Create a 2/2 colorless Spawn artifact creature token.

Vigilance, lifelink (Attacking doesn't cause this creature to tap. Damage dealt by this creature also causes you to gain that much life.)

: 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.

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.

When Specimen Collector enters, create a 1/1 green Squirrel creature token and a 0/3 blue Crab creature token.

When Specimen Collector dies, create a token that's a copy of target token you control.

Put a double strike counter on target creature, then goad each creature that had a double strike counter put on it this way. (Until your next turn, those creatures attack each combat if able and attack a player other than you if able.)

Overload (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")

Flying

When Specter of Mortality enters, you may exile one or more creature cards from your graveyard. When you do, each other creature gets -X/-X until end of turn, where X is the number of cards exiled this way.

Target opponent reveals their hand. You may choose a nonland card from it. If you do, that player exiles that card. If a nonblack card is exiled this way, exile a card from your hand.

Target player discards a card at random.

Flash

Flying

When Spectral Adversary enters, you may pay any number of times. When you pay this cost one or more times, put that many +1/+1 counters on Spectral Adversary, then up to that many other target artifacts, creatures, and/or enchantments phase out.

Whenever Spectral Bears attacks, if defending player controls no black nontoken permanents, it doesn't untap during your next untap step.

Enchant creature

Enchanted creature has shroud as long as it's untapped. (It can't be the target of spells or abilities.)

Enchant creature

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

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)

As long as Spectral Gateguards is paired with another creature, both creatures have vigilance.

As long as Spectral Guardian is untapped, noncreature artifacts have shroud. (They can't be the targets of spells or abilities.)

Protection from green

: Regenerate Spectral Lynx.