Instant and sorcery spells you cast cost less to cast.

+1: Rowan, Scholar of Sparks deals 1 damage to each opponent. If you've drawn three or more cards this turn, she deals 3 damage to each opponent instead.

−4: You get an emblem with "Whenever you cast an instant or sorcery spell, you may pay . If you do, copy that spell. You may choose new targets for the copy."

Bloodrush — , Discard Rubblebelt Maaka: Target attacking creature gets +3/+3 until end of turn.

Rubblehulk's power and toughness are each equal to the number of lands you control.

Bloodrush — , Discard Rubblehulk: Target attacking creature gets +X/+X until end of turn, where X is the number of lands you control.

Choose one —

• Untap all lands you control.

• Until end of turn, lands you control become 2/2 creatures that are still lands.

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

Flying, lifelink

At the beginning of your end step, if you descended this turn, scry 1. (You descended if a permanent card was put into your graveyard from anywhere.)

As Rukarumel, Biologist enters the battlefield, choose a creature type.

Slivers you control and nontoken creatures you control are the chosen type in addition to their other creature types. The same is true for creature spells you control and creature cards you own that aren't on the battlefield.

, : Create a 1/1 colorless Sliver creature token.

Menace (This creature can't be blocked except by two or more creatures.)

Whenever Rulik Mons, Warren Chief attacks, look at the top card of your library. If it's a land card, you may put it onto the battlefield tapped. If you didn't put a card onto the battlefield this way, create a 1/1 red Goblin creature token.

Rumbling Rockslide deals damage to target creature equal to the number of lands you control.

Whenever you cast a red spell, if Runaway Steam-Kin has fewer than three +1/+1 counters on it, put a +1/+1 counter on Runaway Steam-Kin.

Remove three +1/+1 counters from Runaway Steam-Kin: Add .

Equipped creature has first strike and gets +X/+0, where X is the number of instant and sorcery cards in your graveyard.

Equip

When you have 30 or more life, flip Rune-Tail, Kitsune Ascendant.

Flying

When Runo Stromkirk enters the battlefield, put up to one target creature card from your graveyard on top of your library.

At the beginning of your upkeep, look at the top card of your library. You may reveal that card. If a creature card with mana value 6 or greater is revealed this way, transform Runo Stromkirk.

You may choose not to untap Rust Tick during your untap step.

, : Tap target artifact. It doesn't untap during its controller's untap step for as long as Rust Tick remains tapped.

, : Look at the top card of target player's library. If it has an Agents of S.N.E.A.K. watermark, you may reveal it and put it into your hand. Otherwise, put it on the top or bottom of its owner's library.

Sacred Knight can't be blocked by black and/or red creatures.

When Saddleback Lagac enters the battlefield, support 2. (Put a +1/+1 counter on each of up to two other target creatures.)

Sacrifice Saffi Eriksdotter: When target creature is put into your graveyard this turn, return that card to the battlefield.

Return target sorcery card from your graveyard to your hand.

You may have Sakashima of a Thousand Faces enter the battlefield as a copy of another creature you control, except it has Sakashima of a Thousand Faces's other abilities.

The "legend rule" doesn't apply to permanents you control.

Partner (You can have two commanders if both have partner.)

Flash

Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

You may have Sakashima's Protege enter the battlefield as a copy of any permanent that entered the battlefield this turn.

Choose one. If you control a commander as you cast this spell, you may choose both instead.

• Target opponent chooses a creature they control. You gain control of it.

• Choose a creature you control. Each other creature you control becomes a copy of that creature until end of turn.

Sacrifice Sakura-Tribe Elder: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

At the beginning of your upkeep, add . Until end of turn, you don't lose this mana as steps and phases end.

: Add one mana of any color. Activate only once each turn.

Humans you control get +1/+1.

, Tap two untapped Humans you control: Tap target creature an opponent controls.

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

Flash

When Sandstalker Moloch enters the battlefield, if an opponent cast a blue and/or black spell this turn, look at the top four cards of your library. You may reveal a permanent card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

When Sanguine Brushstroke enters the battlefield, create a Blood token and conjure a card named Blood Artist onto the battlefield.

Whenever you sacrifice a Blood token, each opponent loses 1 life and you gain 1 life.

Whenever you crank Sap Sucker, add . Until end of turn, you don't lose this mana as steps and phases end.

: Mill a card. If a land card was milled this way, Saprazzan Breaker can't be blocked this turn.

Whenever Saradoc, Master of Buckland or another nontoken creature with power 2 or less enters the battlefield under your control, create a 1/1 white Halfling creature token.

Tap two other untapped Halflings you control: Saradoc gets +2/+0 and gains lifelink until end of turn.

When Sarevok's Tome enters the battlefield, you take the initiative.

: Add . If you have the initiative, add instead.

, : Exile cards from the top of your library until you exile a nonland card. You may cast that card without paying its mana cost. Activate only if you've completed a dungeon.

0: Reveal the top card of your library and put it into your hand. Sarkhan the Mad deals damage to himself equal to that card's mana value.

−2: Target creature's controller sacrifices it, then that player creates a 5/5 red Dragon creature token with flying.

−4: Each Dragon creature you control deals damage equal to its power to target player or planeswalker.

+1: Draw a card, then add one mana of any color.

−2: Create a 4/4 red Dragon creature token with flying.

−8: Search your library for any number of Dragon creature cards, put them onto the battlefield, then shuffle.

+2: Sarkhan, Dragonsoul deals 1 damage to each opponent and each creature your opponents control.

−3: Sarkhan, Dragonsoul deals 4 damage to target player or planeswalker.

−9: Search your library for any number of Dragon creature cards, put them onto the battlefield, then shuffle.

Dragon spells you cast cost less to cast.

Whenever a Dragon enters the battlefield under your control, you may have Sarkhan, Soul Aflame become a copy of it until end of turn, except its name is Sarkhan, Soul Aflame and it's legendary in addition to its other types.

+1: Dragon cards in your hand perpetually gain "This spell costs less to cast", and "You may pay rather than pay this spell's mana cost, where X is its mana value."

0: Conjure a card named Shivan Dragon into your hand.

−2: Sarkhan, Wanderer to Shiv deals 3 damage to target creature.

Sarkhan's Dragonfire deals 3 damage to any target.

Look at the top five cards of your library. You may reveal a red card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Sarkhan's Scorn deals damage equal to the number of turns you have begun to target creature or planeswalker.

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.

When Sarulf's Packmate enters the battlefield, draw a card.

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.)

When Saruli Gatekeepers enters the battlefield, if you control two or more Gates, you gain 7 life.

Vigilance, haste

As Saskia the Unyielding enters the battlefield, choose a player.

Whenever a creature you control deals combat damage to a player, it deals that much damage to the chosen player.

Ward—Sacrifice a legendary artifact or legendary creature.

Whenever an opponent casts a spell, amass Orcs 1.

Whenever an Army you control deals combat damage to a player, the Ring tempts you.

Whenever the Ring tempts you, you may discard your hand. If you do, draw four cards.

: 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.

Training (Whenever this creature attacks with another creature with greater power, put a +1/+1 counter on this creature.)

Whenever Savior of Ollenbock trains, exile up to one other target creature from the battlefield or creature card from a graveyard.

When Savior of Ollenbock leaves the battlefield, put the exiled cards onto the battlefield under their owners' control.

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.)

Trample

Whenever this creature mutates, destroy target noncreature permanent. Its controller creates a 3/3 green Beast creature token.

Flying

, Sacrifice Scaldkin: It deals 2 damage to any target.

Flying

Whenever a Dragon you control becomes the target of a spell or ability an opponent controls, destroy target nonland permanent that player controls.