As long as an artifact creature you control is attacking, prevent all damage that would be dealt to Sanwell, Avenger Ace.

Whenever Sanwell becomes tapped, exile the top six cards of your library. You may cast a Vehicle or artifact creature spell from among them. Then put the rest on the bottom of your library in a random order.

Indestructible

Whenever Sapling of Colfenor attacks, reveal the top card of your library. If it's a creature card, you gain life equal to that card's toughness, lose life equal to its power, then put it into your hand.

Blue spells you cast cost less to cast.

Whenever Saprazzan Heir becomes blocked, you may draw three cards.

, Discard a card: Create a 1/1 green Saproling creature token. Any player may activate this ability.

You may cast Saproling Symbiosis as though it had flash if you pay more to cast it. (You may cast it any time you could cast an instant.)

Create a 1/1 green Saproling creature token for each creature you control.

Whenever you cast a historic spell, investigate. This ability triggers only once each turn. (Artifacts, legendaries, and Sagas are historic. To investigate, create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Doctor's companion (You can have two commanders if the other is the Doctor.)

First strike, trample

Whenever Sardian Avenger attacks, it gets +X/+0 until end of turn, where X is the number of artifacts your opponents control.

Whenever an artifact an opponent controls is put into a graveyard from the battlefield, Sardian Avenger deals 1 damage to that player.

Whenever a creature attacks you or a planeswalker you control, each Dragon you control deals 1 damage to that creature.

+1: Until end of turn, each planeswalker you control becomes a 4/4 red Dragon creature and gains flying.

−3: Create a 4/4 red Dragon creature token with flying.

Whenever you cast a creature spell with power 4, 5, or 6, Sarkhan's Unsealing deals 4 damage to any target.

Whenever you cast a creature spell with power 7 or greater, Sarkhan's Unsealing deals 4 damage to each opponent and each creature and planeswalker they control.

Whenever a permanent an opponent controls is put into a graveyard from the battlefield, put a +1/+1 counter on Sarulf, Realm Eater.

At the beginning of your upkeep, if Sarulf has one or more +1/+1 counters on it, you may remove all of them. If you do, exile each other nonland permanent with mana value less than or equal to the number of counters removed this way.

Reveal your hand: If you have seven or more land cards in your hand, flip Sasaya, Orochi Ascendant.

Whenever you activate a ninjutsu ability, look at the top three cards of your library. Put one of them into your hand and the rest on the bottom of your library in any order. This ability triggers only once each turn.

Each creature card in your hand has ninjutsu .

: Put a lore counter on each Saga you control. Activate only as a sorcery.

When Satsuki, the Living Lore dies, choose up to one —

• Return target Saga or enchantment creature you control to its owner's hand.

• Return target Saga card from your graveyard to your hand.

Menace

Whenever Sauron, the Necromancer attacks, exile target creature card from your graveyard. Create a tapped and attacking token that's a copy of that card, except it's a 3/3 black Wraith with menace. At the beginning of the next end step, exile that token unless Sauron is your Ring-bearer.

Cast this spell only during your turn and only during combat.

Choose one —

• Creatures you control gain double strike until end of turn.

• Untap all creatures you control. After this phase, there is an additional combat phase.

Entwine (Choose both if you pay the entwine cost.)

: Savage Knuckleblade gets +2/+2 until end of turn. Activate only once each turn.

: Return Savage Knuckleblade to its owner's hand.

: Savage Knuckleblade gains haste until end of turn.

This spell can't be countered.

The next creature spell you cast this turn can be cast as though it had flash. That spell can't be countered. That creature enters with an additional +1/+1 counter on it.

(: Add , , or .)

Savai Triome enters tapped.

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

Whenever you sacrifice a black creature, you may pay 2 life. If you do, each other player sacrifices a creature.

Whenever you sacrifice a green creature, you may gain 2 life.

Destroy target creature. If that creature dies this way, its controller creates two tokens that are copies of that creature, except their power is half that creature's power and their toughness is half that creature's toughness. Round up each time.

As Sawhorn Nemesis enters, choose a player.

If a source would deal damage to the chosen player or a permanent they control, it deals double that damage instead.

Haste

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)

Whenever an opponent casts a noncreature spell, if Scab-Clan Berserker is renowned, Scab-Clan Berserker deals 2 damage to that player.

, Pay 1 life, Sacrifice Scalding Tarn: Search your library for an Island or Mountain card, put it onto the battlefield, then shuffle.

Whenever an opponent casts a spell with mana value 3 or less, Scalding Viper deals 1 damage to that player.

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

Whenever Scalpelexis deals combat damage to a player, that player exiles the top four cards of their library. If two or more of those cards have the same name, repeat this process.

, Exile an Assassin card from your graveyard: Destroy target creature.

You may exile a white card from your hand rather than pay this spell's mana cost.

Prevent the next 7 damage that would be dealt to any target this turn. If it's a creature, put a +0/+1 counter on it for each 1 damage prevented this way at the beginning of the next end step.

Counter target spell.

Awaken 3— (If you cast this spell for , also put three +1/+1 counters on target land you control and it becomes a 0/0 Elemental creature with haste. It's still a land.)

Flying, vigilance, trample, lifelink

, Exile Scavenged Brawler from your graveyard: Choose target creature. Put four +1/+1 counters, a flying counter, a vigilance counter, a trample counter, and a lifelink counter on that creature. Activate only as a sorcery.

(Gain the next level as a sorcery to add its ability.)

Whenever one or more creatures you control die, create a Food token. This ability triggers only once each turn.

: Level 2

//Level_2//

Whenever you sacrifice a permanent, target player mills two cards.

: Level 3

//Level_3//

At the beginning of your end step, you may sacrifice three other nonland permanents. If you do, return a creature card from your graveyard to the battlefield with a finality counter on it.

Equipped creature gets +2/+0 and has trample.

Whenever equipped creature deals combat damage to a player, create that many 1/1 green and white Citizen creature tokens.

Equip

, : Target player discards a card. Activate only during your turn.

: Add one mana of any color.

: Add three mana of any one color. Activate only if you control three or more lands with the same name.

As Scheming Fence enters, you may choose a nonland permanent.

Activated abilities of the chosen permanent can't be activated.

Scheming Fence has all activated abilities of the chosen permanent except for loyalty abilities. You may spend mana as though it were mana of any color to activate those abilities.

Scholar of New Horizons enters with a +1/+1 counter on it.

, Remove a counter from a permanent you control: Search your library for a Plains card and reveal it. If an opponent controls more lands than you, you may put that card onto the battlefield tapped. If you don't put the card onto the battlefield, put it into your hand. Then shuffle.

When Scholarship Sponsor enters, each player who controls fewer lands than the player who controls the most lands searches their library for a number of basic land cards less than or equal to the difference, puts those cards onto the battlefield tapped, then shuffles.

Trample

Whenever Scion of Darkness deals combat damage to a player, you may put target creature card from that player's graveyard onto the battlefield under your control.

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

Whenever Scion of Opulence or another nontoken Vampire you control dies, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

, Sacrifice two artifacts: Exile the top card of your library. You may play that card this turn.

Scion of the Wild's power and toughness are each equal to the number of creatures you control.

As an additional cost to cast this spell, discard X land cards.

Destroy X target lands.

At the beginning of your upkeep, flip a coin. If you lose the flip, return Scoria Wurm to its owner's hand.

Flying

: Scourge of Kher Ridges deals 2 damage to each creature without flying.

: Scourge of Kher Ridges deals 6 damage to each other creature with flying.

Trample

Scourge of Skola Vale enters with two +1/+1 counters on it.

, Sacrifice another creature: Put a number of +1/+1 counters on Scourge of Skola Vale equal to the sacrificed creature's toughness.

Flying

Whenever Scourge of Valkas or another Dragon you control enters, it deals X damage to any target, where X is the number of Dragons you control.

: Scourge of Valkas gets +1/+0 until end of turn.

, Sacrifice Scourglass: Destroy all permanents except for artifacts and lands. Activate only during your upkeep.

For each nonland permanent, choose a player at random. Then each player gains control of each permanent for which they were chosen. Untap those permanents.

Whenever Scrap Trawler or another artifact you control is put into a graveyard from the battlefield, return to your hand target artifact card in your graveyard with lesser mana value.

Whenever an artifact or enchantment is put into your graveyard from the battlefield, you gain 1 life.