Flying

Whenever a player attacks you, if that player has another opponent who isn't being attacked, prevent all combat damage that would be dealt to you this combat.

Whenever you discard a creature card, put a +1/+1 counter on Surly Badgersaur.

Whenever you discard a land card, create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Whenever you discard a noncreature, nonland card, Surly Badgersaur fights up to one target creature you don't control.

When Surprise Party enters, yell "Surprise" and put onto the battlefield any number of printed Clown Robot tokens that aren't touching each other, that you hid on the battlefield before you cast Surprise Party, and that weren't spotted by an opponent before you cast Surprise Party.

Robots you control get +1/+0 and have vigilance.

Surtland Frostpyre enters tapped.

: Add .

, , Sacrifice Surtland Frostpyre: Scry 2. Surtland Frostpyre deals 2 damage to each creature. Activate only as a sorcery.

Destroy target land. Create a 1/1 red Goblin creature token.

Whenever Suspicious Nanny deals combat damage to a player, it reassembles target Contraption that player controls. (Gain control of it and move it onto one of your sprockets.)

Svyelun of Sea and Sky has indestructible as long as you control at least two other Merfolk.

Whenever Svyelun attacks, draw a card.

Other Merfolk you control have ward . (Whenever another Merfolk you control becomes the target of a spell or ability an opponent controls, counter it unless that player pays .)

Svyelunite Temple enters tapped.

: Add .

, Sacrifice Svyelunite Temple: Add .

Flying

Whenever CARDNAME attacks, it gets +1/+0 until end of turn for each Locus you control.

Create two 1/1 green Squirrel creature tokens. Then each creature that isn't an Insect, Rat, Spider, or Squirrel gets -1/-1 until end of turn for each creature you control that's an Insect, Rat, Spider, or Squirrel.

Each player shuffles their hand, graveyard, and all permanents they own into their library, then draws seven cards. Each player's life total becomes 7.

Equipped creature gets +2/+2 and has protection from green and from blue.

Whenever equipped creature deals combat damage to a player, you create a 2/2 green Wolf creature token and that player mills ten cards.

Equip

First strike, haste

Sanctified Rules of Combat — When Sycorax Commander enters, each opponent faces a villainous choice — That opponent discards all the cards in their hand, then draws that many cards minus one, or Sycorax Commander deals damage to that player equal to the number of cards in their hand.

At the beginning of each end step, if an opponent lost 3 or more life this turn, you may draw a card. (Damage causes loss of life.)

Vigilance

As long as you control six or more lands, Sylvan Advocate and land creatures you control get +2/+2.

Until your next turn, all lands you control become 2/2 Elemental creatures with reach, indestructible, and haste. They're still lands.

Target player gains 8 life.

Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

Defender, hexproof

: Add one mana of any color.

When Sylvan Hierophant dies, exile Sylvan Hierophant, then return another target creature card from your graveyard to your hand.

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

When Sylvan Messenger enters, reveal the top four cards of your library. Put all Elf cards revealed this way into your hand and the rest on the bottom of your library in any order.

Choose an opponent. You and that player each create an X/X green Treefolk creature token.

Choose an opponent. You and that player each create X 1/1 green Elf Warrior creature tokens.

Reach

When Sylvan Primordial enters, for each opponent, destroy target noncreature permanent that player controls. For each permanent destroyed this way, search your library for a Forest card and put that card onto the battlefield tapped. Then shuffle.

Exile up to two target artifacts and/or enchantments.

Basic landcycling (, Discard this card: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.)

At the beginning of your end step, choose one —

• Put a +1/+1 counter on target creature you control.

• Create a 3/3 green Raccoon creature token if you control a creature with power 4 or greater.

Vigilance

Whenever Sylvan Shepherd attacks, roll a d20.

1–9 | You gain 1 life.

10–19 | You gain 2 life.

20 | You gain 5 life.

Sylvan Yeti's power is equal to the number of cards in your hand.

For Mirrodin (When this Equipment enters, create a 2/2 red Rebel creature token, then attach this to it.)

Equipped creature gets +4/+4 and has trample.

Equip

Equipped creature gets +1/+0.

Whenever equipped creature dies, you gain 3 life.

Equip

Two target creatures each get +2/+2 until end of turn.

Skip your draw step.

, Tap two untapped creatures you control: Draw a card.

When Symbiotic Wurm dies, create seven 1/1 green Insect creature tokens.

Create a 1/1 colorless Expansion-Symbol creature token for each different expansion symbol among permanents you control.

Flying

Magecraft — Whenever you cast or copy an instant or sorcery spell, target creature you control has base power 2 until end of turn.

Whenever a Sliver deals combat damage to a player, its controller may draw a card.

Synchronized Spellcraft deals 4 damage to target creature and X damage to that creature's controller, where X is the number of creatures in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

All Sliver creatures have vigilance.

Extort (Whenever you cast a spell, you may pay . If you do, each opponent loses 1 life and you gain that much life.)

, : Tap target creature with power 4 or greater.

, : Syndicate Guildmage deals 2 damage to target opponent or planeswalker.

Flying

As long as there are five or more mana values among cards in your graveyard, Syndicate Infiltrator gets +2/+2.

Flying, ward

When Syndicate Recruiter enters the battlefield, mill four cards. Then if there are five or more mana values among cards in your graveyard, conjure a card named Dig Up the Body into your hand.

, : Tap X target noncreature artifacts.

, : Untap X target noncreature artifacts.

, : Exile target permanent you control.

, Sacrifice Synod Sanctum: Return all cards exiled with Synod Sanctum to the battlefield under your control.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)

You may have Synth Infiltrator enter as a copy of any creature on the battlefield, except it's a Synth artifact creature in addition to its other types.

Exile all creatures you control. At the beginning of the next end step, reveal cards from the top of your library until you reveal that many creature cards, put all creature cards revealed this way onto the battlefield, then shuffle the rest of the revealed cards into your library.

Each other player sacrifices a creature. You create a 2/2 black Zombie creature token for each creature sacrificed this way.

Each other player discards a card. You draw a card for each card discarded this way.

Syphon Soul deals 2 damage to each other player. You gain life equal to the damage dealt this way.

When Syr Armont, the Redeemer enters, create a Monster Role token attached to another target creature you control. (If you control another Role on it, put that one into the graveyard. Enchanted creature gets +1/+1 and has trample.)

Enchanted creatures you control get +1/+1.

Whenever Syr Carah, the Bold or an instant or sorcery spell you control deals damage to a player, exile the top card of your library. You may play that card this turn.

: Syr Carah deals 1 damage to any target.

Whenever Syr Faren, the Hengehammer attacks, another target attacking creature gets +X/+X until end of turn, where X is Syr Faren's power.