At the beginning of your upkeep, you may put a verse counter on Serra's Liturgy.

, Sacrifice Serra's Liturgy: Destroy up to X target artifacts and/or enchantments, where X is the number of verse counters on Serra's Liturgy.

Serrated Arrows enters with three arrowhead counters on it.

At the beginning of your upkeep, if there are no arrowhead counters on Serrated Arrows, sacrifice it.

, Remove an arrowhead counter from Serrated Arrows: Put a -1/-1 counter on target creature.

: Add .

Any time you could mulligan and Serum Powder is in your hand, you may exile all the cards from your hand, then draw that many cards. (You can do this in addition to taking mulligans.)

Whenever Serum Tank or another artifact enters, put a charge counter on Serum Tank.

, , Remove a charge counter from Serum Tank: Draw a card.

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

When Servant of Volrath leaves the battlefield, sacrifice a creature.

Other Snake creatures you control get +2/+2.

Whenever a Snake you control deals combat damage to a player, you may draw a card.

Flying

: Setessan Griffin gets +2/+2 until end of turn. Activate only once each turn.

When Setessan Starbreaker enters, you may destroy target Aura.

Tap an untapped Druid you control: Add .

Reach (This creature can block creatures with flying.)

Threshold — Seton's Scout gets +2/+2 as long as seven or more cards are in your graveyard.

Exile target creature and all other creatures with the same name as that creature.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

As Sewer Nemesis enters, choose a player.

Sewer Nemesis's power and toughness are each equal to the number of cards in the chosen player's graveyard.

Whenever the chosen player casts a spell, that player mills a card.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Scavenge (, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

Choose target creature. If it's attacking, it can't be blocked this turn. If it's blocking, prevent all combat damage that would be dealt this combat by it and each creature it's blocking.

Prevent the next 3 damage that would be dealt this turn to any number of targets, divided as you choose. If there are more people in the room of a different gender than you are as you cast this spell, prevent the next 6 damage this way instead.

: Shade of Trokair gets +1/+1 until end of turn.

Suspend 3— (Rather than cast this card from your hand, you may pay and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)

Enchant creature

Enchanted creature has ": This creature gets +1/+1 until end of turn."

When enchanted creature dies, return that card to the battlefield under your control.

, : Put target creature you control on top of its owner's library.

, : Shadow Guildmage deals 1 damage to any target and 1 damage to you.

( can be paid with either or .)

Players can't search libraries this turn.

Draw a card.

Target creature gains shadow until end of turn. (It can block or be blocked by only creatures with shadow.)

Draw a card.

All Sliver creatures have shadow. (They can block or be blocked by only creatures with shadow.)

, , Sacrifice Shadowblood Egg: Add . Draw a card.

A deck can have any number of cards named Shadowborn Apostle.

, Sacrifice six creatures named Shadowborn Apostle: Search your library for a Demon creature card, put it onto the battlefield, then shuffle.

Exile target card from a graveyard. You gain 3 life.

Shadowstorm deals 2 damage to each creature with shadow.

Players play a Magic subgame, using their libraries as their decks. Each player who doesn't win the subgame loses half their life, rounded up.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Shaleskin Plower is turned face up, destroy target land.

: The next 1 damage that would be dealt to Shaman en-Kor this turn is dealt to target creature you control instead.

: The next time a source of your choice would deal damage to target creature this turn, that damage is dealt to Shaman en-Kor instead.

Flash (You may cast this spell any time you could cast an instant.)

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

Sacrifice Shambling Shell: Put a +1/+1 counter on target creature.

Dredge 3 (If you would draw a card, you may mill three cards instead. If you do, return this card from your graveyard to your hand.)

When Shambling Swarm dies, distribute three -1/-1 counters among one, two, or three target creatures. For each -1/-1 counter you put on a creature this way, remove a -1/-1 counter from that creature at the beginning of the next end step.

The controller of target artifact sacrifices it, then reveals cards from the top of their library until they reveal an artifact card. That player puts that card onto the battlefield, then shuffles all other cards revealed this way into their library.

Whenever Shape Stealer blocks or becomes blocked by a creature, change Shape Stealer's base power and toughness to that creature's power and toughness until end of turn.

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

When Shaper Parasite is turned face up, target creature gets +2/-2 or -2/+2 until end of turn.

As Shapeshifter enters, choose a number between 0 and 7.

At the beginning of your upkeep, you may choose a number between 0 and 7.

Shapeshifter's power is equal to the last chosen number and its toughness is equal to 7 minus that number.

Search your library for a Plains card, an Island card, a Swamp card, and a Mountain card. Reveal those cards, put them into your hand, then shuffle.

As an additional cost to cast this spell, sacrifice a land.

Shard Volley deals 3 damage to any target.

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.)

As an additional cost to cast this spell, tap four untapped creatures you control.

Draw three cards.

Join forces — Starting with you, each player may pay any amount of mana. Each player mills X cards, where X is the total amount of mana paid this way.

Equipped creature has first strike.

As long as equipped creature is a Human, it gets +1/+1.

Equip

Destroy target artifact.

Return X target creature cards from your graveyard to your hand. You lose X life.

Discard all the cards in your hand, then draw that many cards.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Exile target artifact.

Replicate (When you cast this spell, copy it for each time you paid its replicate cost. You may choose new targets for the copies.)

Destroy target artifact.

Destroy all artifacts. They can't be regenerated.

, : Shauku's Minion deals 2 damage to target white creature.

: Target creature loses all "bands with other" abilities until end of turn.