, Sacrifice Samite Censer-Bearer: Prevent the next 1 damage that would be dealt to each creature you control this turn.

Prevent all damage that would be dealt to you this turn by a source of your choice. Whenever damage from a black or red source is prevented this way this turn, you gain that much life.

: Prevent the next 1 damage that would be dealt to target creature this turn. Any player may activate this ability.

Sacrifice Sanctum Guardian: The next time a source of your choice would deal damage to any target this turn, prevent that damage.

As long as an artifact creature you control is attacking, prevent all damage that would be dealt to Sanwell, Avenger Ace.

Whenever Sanwell becomes tapped, exile the top six cards of your library. You may cast a Vehicle or artifact creature spell from among them. Then put the rest on the bottom of your library in a random order.

, : Prevent all damage that would be dealt to you this turn by creatures with flying.

, Exile the top four cards of your library: The next time a source of your choice would deal damage to you this turn, prevent that damage.

Sekki, Seasons' Guide enters with eight +1/+1 counters on it.

If damage would be dealt to Sekki, prevent that damage, remove that many +1/+1 counters from Sekki, and create that many 1/1 colorless Spirit creature tokens.

Sacrifice eight Spirits: Return Sekki from your graveyard to the battlefield.

Flying

Prevent all combat damage that would be dealt to Seraph of the Sword.

: Prevent the next 1 damage that would be dealt to any target this turn.

, : Target creature gains vigilance until end of turn.

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.

: Prevent the next 1 damage that would be dealt to you this turn.

If a source would deal damage to equipped creature, prevent 2 of that damage.

Equip

: Return target card from an opponent's graveyard to their hand. Prevent all damage that would be dealt to any target this turn by a source of your choice.

Prevent the next 3 damage that would be dealt to any target this turn.

If an opponent controls a Mountain and you control a Plains, you may cast this spell without paying its mana cost.

Prevent all damage that would be dealt this turn to creatures you control.

Slivers you control have hope. (Prevent all damage that would be dealt to attacking creatures with hope.)

Defender

Sokrates, Athenian Teacher has hexproof as long as it's untapped.

Sokratic Dialogue — : Until end of turn, target creature gains "If this creature would deal combat damage to a player, prevent that damage. This creature's controller and that player each draw half that many cards, rounded down."

At the beginning of your upkeep, sacrifice Solitary Confinement unless you discard a card.

Skip your draw step.

You have shroud. (You can't be the target of spells or abilities.)

Prevent all damage that would be dealt to you.

: Target creature you control gains flying until end of turn.

: Prevent all combat damage that would be dealt to and dealt by target creature you control this turn.

If a green source would deal damage to you, prevent 2 of that damage.

If a red source would deal damage to you, prevent 2 of that damage.

If a blue source would deal damage to you, prevent 2 of that damage.

Spike Weaver enters with three +1/+1 counters on it.

, Remove a +1/+1 counter from Spike Weaver: Put a +1/+1 counter on target creature.

, Remove a +1/+1 counter from Spike Weaver: Prevent all combat damage that would be dealt this turn.

, : Prevent the next 2 damage that would be dealt to any target this turn.

At the beginning of your upkeep, put a spore counter on Spore Flower.

Remove three spore counters from Spore Flower: Prevent all combat damage that would be dealt this turn.

: Prevent the next 1 damage that would be dealt to target creature this turn.

Prevent all combat damage that would be dealt to and dealt by creatures you control.

: Prevent all damage that would be dealt to Stonewise Fortifier by target creature this turn.

As Story Circle enters, choose a color.

: The next time a source of your choice of the chosen color would deal damage to you this turn, prevent that damage.

Prevent the next 4 damage that would be dealt to any target this turn.

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

When you cycle Sunfire Balm, you may prevent the next 1 damage that would be dealt to any target this turn.

, Sacrifice a snow land: Prevent all combat damage that would be dealt this turn.

You and permanents you control gain hexproof until end of turn. Prevent all damage that black and/or red sources would deal to creatures you control this turn.

Prevent the next 2 damage that would be dealt to any target this turn.

Draw a card at the beginning of the next turn's upkeep.

Cast this spell only during an opponent's turn and only during combat.

Prevent all combat damage that would be dealt to you and planeswalkers you control this turn. Untap all attacking creatures and goad them. After this phase, there is an additional combat phase.

Prevent all combat damage that would be dealt this turn by creatures without trample.

Prevent the next X damage that would be dealt to target creature this turn. For each 1 damage prevented this way, put a +1/+1 counter on that creature.

Flash

Enchant creature

Enchanted creature has shadow. (It can block or be blocked by only creatures with shadow.)

Prevent all damage that would be dealt by enchanted creature.

Prevent the next 3 damage that would be dealt to target creature this turn. For each 1 damage prevented this way, put a +1/+1 counter on that creature.

The Mindskinner can't be blocked.

If a source you control would deal damage to an opponent, prevent that damage and each opponent mills that many cards.

Cumulative upkeep—Exile the top card of your library. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)

When a player doesn't pay Thought Lash's cumulative upkeep, that player exiles all cards from their library.

Exile the top card of your library: Prevent the next 1 damage that would be dealt to you this turn.

Prevent all damage that would be dealt this turn by creatures your opponents control.

Torrent of Lava deals X damage to each creature without flying.

As long as Torrent of Lava is on the stack, each creature has ": Prevent the next 1 damage that would be dealt to this creature by Torrent of Lava this turn."

, : Prevent the next 2 damage that would be dealt to any target this turn.

Sacrifice a land: Prevent the next 2 damage that would be dealt to any target this turn.

Unbreathing Horde enters with a +1/+1 counter on it for each other Zombie you control and each Zombie card in your graveyard.

If Unbreathing Horde would be dealt damage, prevent that damage and remove a +1/+1 counter from it.

As an additional cost to cast this spell, you may pay .

Prevent all combat damage that would be dealt this turn. If this spell's additional cost was paid, this effect doesn't affect combat damage that would be dealt by red creatures.

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

Damage can't be prevented this turn. If this spell was kicked, it deals 5 damage to target player or planeswalker.

Ursine Fylgja enters with four healing counters on it.

Remove a healing counter from Ursine Fylgja: Prevent the next 1 damage that would be dealt to Ursine Fylgja this turn.

: Put a healing counter on Ursine Fylgja.