Modular 2 (This creature enters the battlefield 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.

, Sacrifice another artifact: Scrapyard Steelbreaker gets +2/+1 until end of turn.

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.)

Equipped creature gets +0/+3 and has ", : Target player mills three cards."

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

Dash (You may cast this spell for its dash cost. If you do, it gains haste, and it's returned from the battlefield to its owner's hand at the beginning of the next end step.)

, Exile a card from your graveyard: Screams of the Damned deals 1 damage to each creature and each player.

Flying

When Screeching Buzzard dies, each opponent discards a card.

Flying

: Target creature can't block Screeching Griffin this turn.

Flying

: Creatures you control get +1/+0 until end of turn.

Flying

Metalcraft — Whenever Screeching Silcaw deals combat damage to a player, if you control three or more artifacts, that player mills four cards.

All Slivers have ": Target player mills a card."

, , Sacrifice Scribe of the Mindful: Return target instant or sorcery card from your graveyard to your hand.

, Sacrifice Scroll of Avacyn: Draw a card. If you control an Angel, you gain 5 life.

, Sacrifice Scroll of Griselbrand: Target opponent discards a card. If you control a Demon, that player loses 3 life.

, : Draw a card if you have seven or more cards in hand.

, : Exile any number of cards from your hand face down. Put that many cards from the top of your library into your hand. Then look at the exiled cards and put them on top of your library in any order.

Exile up to one target artifact, creature, or enchantment you control, then return it to the battlefield under its owner's control.

Draw a card.

Equipped creature gets +1/+1.

As long as equipped creature is a Human, it has menace. (It can't be blocked except by two or more creatures.)

Equip

Scrounging Bandar enters the battlefield with two +1/+1 counters on it.

At the beginning of your upkeep, you may move any number of +1/+1 counters from Scrounging Bandar onto another target creature.

Flash

Flying, protection from blue

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

, : Choose a number greater than 0 and a color. Target opponent reveals their hand. If that opponent reveals exactly the chosen number of cards of the chosen color, you draw a card.

When Sculpted Perfection enters the battlefield, incubate 2. (Create an Incubator token with two +1/+1 counters on it and ": Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

Phyrexians you control get +1/+1.

You may have Sculpting Steel enter the battlefield as a copy of any artifact on the battlefield.

Reach

Scurrid Colony gets +2/+2 as long as you control eight or more lands.

Evolve (Whenever a creature enters the battlefield under your control, if that creature has greater power or toughness than this creature, put a +1/+1 counter on this creature.)

Whenever one or more +1/+1 counters are put on Scurry Oak, you may create a 1/1 green Squirrel creature token.

At the beginning of your upkeep, if you control five or more lands, put four +1/+1 counters on Scute Mob.

Defender

: Adapt 3. (If this creature has no +1/+1 counters on it, put three +1/+1 counters on it.)

As long as Scuttlegator has a +1/+1 counter on it, it can attack as though it didn't have defender.

, Discard a card: Create a 0/3 blue Crab creature token.

Delirium — Crabs you control get +1/+1 as long as there are four or more card types among cards in your graveyard.

Sacrifice Scuttling Death: Target creature gets -1/-1 until end of turn.

Soulshift 4 (When this creature dies, you may return target Spirit card with mana value 4 or less from your graveyard to your hand.)

Flash

Vigilance

When Scuttling Sentinel enters the battlefield, put a +1/+1 counter on another target creature you control. Until end of turn, that creature becomes a blue Crab in addition to its other types and gains hexproof. (It can't be the target of spells or abilities your opponents control.)

Trample

Persist (When this creature dies, if it had no -1/-1 counters on it, return it to the battlefield under its owner's control with a -1/-1 counter on it.)

Landfall — Whenever a land enters the battlefield under your control, Scythe Leopard gets +1/+1 until end of turn.

Flying

Whenever Scythe Specter deals combat damage to a player, each opponent discards a card. Each player who discarded a card with the highest mana value among cards discarded this way loses life equal to that mana value.

Living weapon (When this Equipment enters the battlefield, create a 0/0 black Phyrexian Germ creature token, then attach this to it.)

Equipped creature gets +1/+1.

Whenever equipped creature deals combat damage to a player, that player loses half their life, rounded up.

Equip

Flying

When Sea Drake enters the battlefield, return two target lands you control to their owner's hand.

Sea Gate enters the battlefield tapped.

As Sea Gate enters the battlefield, choose a color other than blue.

: Add or one mana of the chosen color.

This spell costs less to cast for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

When Sea Gate Oracle enters the battlefield, look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.

Kicker

When Sea Gate Stormcaller enters the battlefield, copy the next instant or sorcery spell with mana value 2 or less you cast this turn when you cast it. If Sea Gate Stormcaller was kicked, copy that spell twice instead. You may choose new targets for the copies.

As Sea Gate, Reborn enters the battlefield, you may pay 3 life. If you don't, it enters the battlefield tapped.

: Add .

Return up to three target creatures and/or enchantments to their owners' hands.

One or more target creatures become blue until end of turn.

Sea Monster can't attack unless defending player controls an Island.

: Add .

, : Add .

: Target land becomes the basic land type of your choice until end of turn.

Flying, protection from red

Seachrome Coast enters the battlefield tapped unless you control two or fewer other lands.

: Add or .

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.)

Flash

Whenever this creature deals combat damage to a player, draw a card.

Seafaring Werewolf can't be blocked.

Whenever Seafaring Werewolf deals combat damage to a player, draw a card.

Nightbound (If a player casts at least two spells during their own turn, it becomes day next turn.)