When Sculpted Perfection enters, 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.

When Scurry of Gremlins enters, create two 1/1 red Gremlin creature tokens. Then you get an amount of (energy counters) equal to the number of creatures you control.

Pay : Creatures you control get +1/+0 and gain haste until end of turn.

: Add one mana of any color.

: Target creature becomes the color or colors of your choice until end of turn.

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.)

Sea Gate enters tapped.

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

: Add or one mana of the chosen color.

: Draw a card for each Ally you control.

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

: Add .

: Add .

, : Add .

: Sea Spirit gets +1/+0 until end of turn.

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

: Add or .

: Seafloor Stalker gets +1/+0 until end of turn and can't be blocked this turn. This ability costs less to activate for each creature in your party. (Your party consists of up to one each of Cleric, Rogue, Warrior, and Wizard.)

Sacrifice Seal of Cleansing: Destroy target artifact or enchantment.

Sacrifice Seal of Fire: It deals 2 damage to any target.

Sacrifice Seal of Removal: Return target creature to its owner's hand.

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

: Monstrosity 3. (If this creature isn't monstrous, put three +1/+1 counters on it and it becomes monstrous.)

When Sealock Monster becomes monstrous, target land becomes an Island in addition to its other types.

Whenever a creature attacks you or a planeswalker you control, investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Searing Barb deals 2 damage to any target. If it's a creature, it can't block this turn. Incubate 1. (Create an Incubator token with a +1/+1 counter on it and ": Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

: Add .

Seaside Citadel enters tapped.

: Add , , or .

When you control no Islands, sacrifice Seasinger.

You may choose not to untap Seasinger during your untap step.

: Gain control of target creature whose controller controls an Island for as long as you control Seasinger and Seasinger remains tapped.

Discard a card: Tap Seasoned Hallowblade. It gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

, 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.

As this land enters, choose a creature type.

: Add .

: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type or activate an ability of a creature source of the chosen type.

Secluded Steppe enters tapped.

: Add .

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

Enchant creature

: Tap enchanted creature.

: Untap enchanted creature.

Defender

: Venture into the dungeon. Activate only as a sorcery. (Enter the first room or advance to the next room.)

Investigate. If this spell was cast from a graveyard, investigate twice instead. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Flashback

: Create a 1/1 white Soldier creature token. Activate only if you control no creatures and only once each turn.

Sedge Troll gets +1/+1 as long as you control a Swamp.

: Regenerate Sedge Troll.

Each creature card in your graveyard has unearth . (: Return the card to the battlefield. The creature gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)

: Draw a card, then discard a card. Activate only if you've cast a noncreature spell this turn.

: Seeker of Sunlight explores. Activate only as a sorcery. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

: Add .

, : Scry 1. (Look at the top card of your library. You may put that card on the bottom.)

: Add .

, Sacrifice Seething Landscape: Search your library for a basic Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

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

Discard a land card: Seismic Assault deals 2 damage to any target.

Trample

, Sacrifice a land: Draw a card.

Mountaincycling (, Discard this card: Search your library for a Mountain card, reveal it, put it into your hand, then shuffle.)

Sejiri Glacier enters tapped.

: Add .

Sejiri Steppe enters tapped.

When Sejiri Steppe enters, target creature you control gains protection from the color of your choice until end of turn.

: Add .

Flying

Pay 2 life: Return Selenia, Dark Angel to its owner's hand.

: Exile target creature card from a graveyard, then populate. (Create a token that's a copy of a creature token you control.)

This land enters tapped.

: Add or .

: Add or .

: Selesnya Keyrune becomes a 3/3 green and white Wolf artifact creature until end of turn.

Selesnya Sanctuary enters tapped.

When Selesnya Sanctuary enters, return a land you control to its owner's hand.

: Add .

, : Add .

: Exile target creature card from a graveyard. That card deals damage equal to its power to Selfless Exorcist.

Whenever a Samurai or Warrior you control attacks alone, it gains lifelink until end of turn.

Sacrifice Selfless Samurai: Another target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Flying

Sacrifice Selfless Spirit: Creatures you control gain indestructible until end of turn.

Vigilance

Whenever you cast a creature spell, create a 1/1 red Mercenary creature token with ": Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."

: Choose a color. Add one mana of that color for each different power among creatures you control.

Whenever another creature enters, its controller may draw a card if its power is greater than each other creature's power.

, : Add X mana in any combination of colors, where X is the greatest power among creatures you control.

Flying

: Senate Courier gains vigilance until end of turn.