mtg.wtf

Kicker {4}{B}
When you cast this spell, if it was kicked, each player loses half their life, rounded up.
Scourge of the Skyclaves's power and toughness are each equal to 20 minus the highest life total among players.

Convoke
Flying
Seraph of the Masses's power and toughness are each equal to the number of creatures you control.

Serpent of the Endless Sea's power and toughness are each equal to the number of Islands you control.
Serpent of the Endless Sea can't attack unless defending player controls an Island.

Serra Avatar's power and toughness are each equal to your life total.
When Serra Avatar is put into a graveyard from anywhere, shuffle it into its owner's library.

As Sewer Nemesis enters the battlefield, 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.

Shambling Suit's power is equal to the number of artifacts and/or enchantments you control.

As Shapeshifter enters the battlefield, 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.

Reach
Sharpshooter Elf's power is equal to the number of creatures you control.
When Sharpshooter Elf enters the battlefield, it deals damage equal to its power to target creature with flying an opponent controls.

Flying, vigilance
Silverwing Squadron's power and toughness are each equal to the number of creatures you control.
Whenever Silverwing Squadron attacks, create a number of 2/2 white Knight creature tokens with vigilance equal to the number of opponents you have.

Sima Yi, Wei Field Marshal's power is equal to the number of Swamps you control.

Trample
As Skyshroud War Beast enters the battlefield, choose an opponent.
Skyshroud War Beast's power and toughness are each equal to the number of nonbasic lands the chosen player controls.

Slag Fiend's power and toughness are each equal to the number of artifact cards in all graveyards.

Smoldering Stagecoach's power is equal to the number of instant and sorcery cards in your graveyard.
Whenever Smoldering Stagecoach attacks, the next instant spell and the next sorcery spell you cast this turn each have cascade.
Crew 2

Flying
Soramaro, First to Dream's power and toughness are each equal to the number of cards in your hand.
{4}, Return a land you control to its owner's hand: Draw a card.

Soul of Eternity's power and toughness are each equal to your life total.
Encore {7}{W}{W}

Soulless One's power and toughness are each equal to the number of Zombies on the battlefield plus the number of Zombie cards in all graveyards.

As an additional cost to cast this spell, discard a card or sacrifice a permanent.
Fathomless descent — Souls of the Lost's power is equal to the number of permanent cards in your graveyard and its toughness is equal to that number plus 1.

First strike
Soulsurge Elemental's power is equal to the number of creatures you control.

Flying, trample
Spellheart Chimera's power is equal to the number of instant and sorcery cards in your graveyard.

Trample
Splinterfright's power and toughness are each equal to the number of creature cards in your graveyard.
At the beginning of your upkeep, mill two cards.

Squelching Leeches's power and toughness are each equal to the number of Swamps you control.

Flying
Sturmgeist's power and toughness are each equal to the number of cards in your hand.
Whenever Sturmgeist deals combat damage to a player, draw a card.

Sumala Rumblers's power is equal to the number of creatures you control.
Myriad

Flying, vigilance, haste
Sunbird Effigy's power and toughness are each equal to the number of colors among the exiled cards used to craft it.
{T}: For each color among the exiled cards used to craft Sunbird Effigy, add one mana of that color.

Trample
As Sutured Ghoul enters the battlefield, exile any number of creature cards from your graveyard.
Sutured Ghoul's power is equal to the total power of the exiled cards and its toughness is equal to their total toughness.