Whenever you proliferate, each opponent loses 2 life and you gain 2 life.

: Each opponent loses 1 life. You gain life equal to the life lost this way.

When Scholar of Stars enters, if you control an artifact, draw a card.

Flying

When Scholar of the Lost Trove enters, you may cast target instant, sorcery, or artifact card from your graveyard without paying its mana cost. If an instant or sorcery spell cast this way would be put into your graveyard, exile it instead.

At the beginning of your upkeep, sacrifice School of Piranha unless you pay .

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.)

: Scion of Glaciers gets +1/-1 until end of turn.

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.

Flash

Cone of Cold — When Scion of Stygia enters, choose target creature an opponent controls, then roll a d20.

1–9 | Tap that creature.

10–20 | Tap that creature. It doesn't untap during its controller's next untap step.

Flying

: Search your library for a Dragon permanent card and put it into your graveyard. If you do, Scion of the Ur-Dragon becomes a copy of that card until end of turn. Then shuffle.

Flying

Devoid (This card has no color.)

When Scion Summoner enters, create a 1/1 colorless Eldrazi Scion creature token. It has "Sacrifice this creature: Add ." ( represents colorless mana.)

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

When Scorch Rider enters, if it was kicked, it gains haste until end of turn.

, Sacrifice a creature: Scorched Rusalka deals 1 damage to target player or planeswalker.

Scoria Cat gets +3/+3 as long as you control no untapped lands.

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

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.)

, Sacrifice this creature: Draw a card.

: Scornful Aether-Lich gains fear and vigilance until end of turn. (Attacking doesn't cause it to tap, and it can't be blocked except by artifact creatures and/or black creatures.)

When Scourge Devil enters, creatures you control get +1/+0 until end of turn.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Scourge of Geier Reach gets +1/+1 for each creature your opponents control.

Flying

You may cast Scourge of Nel Toth from your graveyard by paying and sacrificing two creatures rather than paying its mana cost.

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

Dethrone (Whenever this creature attacks the player with the most life or tied for most life, put a +1/+1 counter on it.)

Whenever Scourge of the Throne attacks for the first time each turn, if it's attacking the player with the most life or tied for most life, untap all attacking creatures. After this phase, there is an additional combat phase.

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Flying

Keen Sight — When Scouting Hawk enters, if an opponent controls more lands than you, search your library for a basic Plains card, put it onto the battlefield tapped, then shuffle.

This spell can't be countered.

Protection from blue

, Sacrifice an artifact with mana value X: Return target artifact card with mana value less than X from your graveyard to the battlefield. It gains haste until end of turn.

Scrapdiver Serpent can't be blocked as long as defending player controls an artifact.

Double strike (This creature deals both first-strike and regular combat damage.)

When Scrapper Champion enters, you get (two energy counters).

Whenever Scrapper Champion attacks, you may pay . If you do, put a +1/+1 counter on it.

Gift a card (You may promise an opponent a gift as you cast this spell. If you do, when it enters, they draw a card.)

Reach

When Scrapshooter enters, if the gift was promised, destroy target artifact or enchantment an opponent controls.

When Scrapwork Cohort enters, create a 1/1 colorless Soldier artifact creature token.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

When Scrapwork Rager enters, you draw a card and you lose 1 life.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

Modular 2 (This creature enters with two +1/+1 counters on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

, Sacrifice an artifact: Search your library for a Construct card, reveal it, put it into your hand, then shuffle.

At the beginning of your upkeep, each player draws a card.

Whenever an opponent draws a card, that player loses 1 life.

Trample

Bio-Plasmic Scream — Whenever you cast a creature spell with mana value 5 or greater, Screamer-Killer deals 5 damage to any target.

Flying

Whenever Screaming Phantom attacks, mill a card. (Put the top card of your library into your graveyard.)

Flying

Whenever you attack with one or more creatures, target player mills that many cards. (To mill a card, a player puts the top card of their library into their graveyard.)

: Put Screaming Swarm from your graveyard into your library second from the top.

Flying

At the beginning of your upkeep, you may pay . If you do, transform Screeching Bat.

Flying

When Screeching Drake enters, draw a card, then discard a card.

Flying

: Regenerate Screeching Harpy.

Flying, menace

Whenever Screeching Scorchbeast attacks, each player gets two rad counters.

Whenever one or more nonland cards are milled, you may create that many 2/2 black Zombie Mutant creature tokens. Do this only once each turn.

When Screeching Skaab enters, mill two cards.

: Exile the top card of target player's library. If it's a land card, you gain 1 life.

Landfall — Whenever a land you control enters, you may untap Scrib Nibblers.

When Scrivener enters, you may return target instant card from your graveyard to your hand.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)

Flash

Flying, protection from blue

Return a Forest you control to its owner's hand: Untap target creature. Activate only once each turn.

: Untap target snow land.

Menace

Whenever Scurrilous Sentry enters or attacks, it connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)

Myriad, myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token that's a copy of this creature that's tapped and attacking that player or a planeswalker they control. Then do it again. Exile the tokens at end of combat.)

Whenever Scurry of Squirrels deals combat damage to a player, put a +1/+1 counter on target creature you control.

Landfall — Whenever a land you control enters, create a 1/1 green Insect creature token. If you control six or more lands, create a token that's a copy of Scute Swarm instead.