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

Sacrifice Serra's Hymn: Prevent the next X damage that would be dealt this turn to any number of targets, divided as you choose, where X is the number of verse counters on Serra's Hymn.

Flying

Whenever you cast a noncreature spell, put an oil counter on Serum-Core Chimera.

Remove three oil counters from Serum-Core Chimera: Draw a card. Then you may discard a nonland card. When you discard a card this way, Serum-Core Chimera deals 3 damage to target creature or planeswalker. Activate only as a sorcery.

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

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

Prevent all damage that would be dealt to Sevinne, the Chronoclasm.

Whenever you cast your first instant or sorcery spell from your graveyard each turn, copy that spell. You may choose new targets for the copy.

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.

, : 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.

Target opponent loses 3 life.

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

The next time a source of your choice would deal damage to you and/or creatures you control this turn, prevent that damage. If damage from a black source is prevented this way, you gain that much life.

Shadowstorm deals 2 damage to each creature with shadow.

Shake the Foundations deals 1 damage to each creature without flying.

Draw a card.

: 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.

Delve (Each card you exile from your graveyard while casting this spell pays for .)

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

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

Sacrifice Shard Phoenix: It deals 2 damage to each creature without flying.

: Return Shard Phoenix from your graveyard to your hand. Activate only during your upkeep.

Flying

Whenever an artifact creature you control deals combat damage to a player, you may create a 1/1 blue Thopter artifact creature token with flying.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Choose one —

• Shatter the Source deals 6 damage to target creature, planeswalker, or battle.

• Destroy target artifact.

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

Menace

Toxic 2 (Players dealt combat damage by this creature also get two poison counters.)

: The next time target attacking creature would deal combat damage to Shield Dancer this turn, that creature deals that damage to itself instead.

If a source would deal damage to equipped creature, prevent X of that damage, where X is the number of creatures you control.

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

Prevent all damage that would be dealt to target creature this turn.

Tap two untapped Clerics you control: Prevent all damage target creature would deal this turn.

Tap two untapped Wizards you control: Prevent all damage target spell would deal this turn.

This spell can't be countered.

Protection from blue (This creature can't be blocked, targeted, dealt damage, enchanted, or equipped by anything blue.)

: Shifting Ceratops gains your choice of reach, trample, or haste until end of turn.

Flying

Whenever Shimian Specter deals combat damage to a player, that player reveals their hand. You choose a nonland card from it. Search that player's graveyard, hand, and library for all cards with the same name as that card and exile them. Then that player shuffles.

Whenever Shinka Gatekeeper is dealt damage, it deals that much damage to you.

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

Shivan Fire deals 2 damage to target creature. If this spell was kicked, it deals 4 damage instead.

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

: Shivan Hellkite deals 1 damage to any target.

: Add .

: Add or . Shivan Reef deals 1 damage to you.

Sacrifice Shock Troops: It deals 2 damage to any target.

Flying

Whenever Shockmaw Dragon deals combat damage to a player, it deals 1 damage to each creature that player controls.

Whenever Shoreline Salvager deals combat damage to a player, if you control an Island, you may draw a card.

Shower of Coals deals 2 damage to each of up to three targets.

Threshold — Shower of Coals deals 4 damage to each of those permanents and/or players instead if seven or more cards are in your graveyard.

Until end of turn, creatures you control gain "When this creature dies, it deals 2 damage to target creature an opponent controls."

As an additional cost to cast this spell, sacrifice an artifact.

Shrapnel Blast deals 5 damage to any target.

Shredding Winds deals 7 damage to target creature with flying.

Flying

Whenever Shriekgeist deals combat damage to a player, that player mills two cards.

Choose one —

• Until end of turn, whenever a creature is dealt damage, destroy it.

• Until end of turn, whenever a creature dies, that creature's controller loses life equal to its toughness.

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

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

Sickening Dreams deals X damage to each creature and each player.

Eminence — Whenever you attack with one or more Knights, if Sidar Jabari of Zhalfir is in the command zone or on the battlefield, draw a card, then discard a card.

Flying, first strike

Whenever Sidar Jabari deals combat damage to a player, return target Knight creature card from your graveyard to the battlefield.

Flying

When Siege Dragon enters, destroy all Walls your opponents control.

Whenever Siege Dragon attacks, if defending player controls no Walls, it deals 2 damage to each creature without flying that player controls.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

: Target creature can't block this turn.

Lieutenant — At the beginning of combat on your turn, if you control your commander, create two 1/1 red Goblin creature tokens. Those tokens gain haste until end of turn.

, Sacrifice a Goblin: Siege-Gang Lieutenant deals 1 damage to any target.

The Nuka-Cola Challenge — Whenever one or more creatures you control deal combat damage to a player, put a quest counter on Sierra, Nuka's Biggest Fan and create a Food token.

Whenever you sacrifice a Food, target creature you control gets +X/+X until end of turn, where X is the number of quest counters on Sierra.

Sigiled Contender has lifelink as long as it has a +1/+1 counter on it. (Damage dealt by this creature also causes you to gain that much life.)

Deathtouch

Whenever Silas Renn, Seeker Adept deals combat damage to a player, choose target artifact card in your graveyard. You may cast that card this turn.

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

Flying

Whenever Silent Specter deals combat damage to a player, that player discards two cards.

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

Ninjutsu (, Return an unblocked attacker you control to hand: Put this card onto the battlefield from your hand tapped and attacking.)

Whenever Silent-Blade Oni deals combat damage to a player, look at that player's hand. You may cast a spell from among those cards without paying its mana cost.

Reach

: Silklash Spider deals X damage to each creature with flying.

Enrage — Whenever Silverclad Ferocidons is dealt damage, each opponent sacrifices a permanent.

Equipped creature gets +1/+1.

Whenever Simian Sling or equipped creature becomes blocked, it deals 1 damage to defending player.

Reconfigure (: Attach to target creature you control; or unattach from a creature. Reconfigure only as a sorcery. While attached, this isn't a creature.)

Simoon deals 1 damage to each creature target opponent controls.