mtg.wtf

Choose any number of target creatures, planeswalkers, and/or players. For each of them, exile the top card of your library, then Soulfire Eruption deals damage equal to that card's mana value to that permanent or player. You may play the exiled cards until the end of your next turn.

When Sovereign's Macuahuitl enters the battlefield, attach it to target creature you control.
Equipped creature gets +2/+0.
Equip {2}

Exile target nonbasic land. Search its controller's graveyard, hand, and library for all cards with the same name as that land and exile them. Then that player shuffles.

Spark Jolt deals 1 damage to any target. Scry 1.

Spark Spray deals 1 damage to any target.
Cycling {R}

Choose target creature. Exile the top card of your library. You may have Spark of Creativity deal damage to that creature equal to the exiled card's mana value. If you don't, you may play that card until end of turn.

Sparkmage's Gambit deals 1 damage to each of up to two target creatures. Those creatures can't block this turn.

Spawning Breath deals 1 damage to any target. Create a 0/1 colorless Eldrazi Spawn creature token. It has "Sacrifice this creature: Add {C}."

Put a double strike counter on target creature, then goad each creature that had a double strike counter put on it this way.
Overload {4}{R}{R}{R}

Kicker {U}
When you cast your next instant or sorcery spell this turn, conjure a duplicate of that spell into your hand. If this spell wasn't kicked, discard the duplicate at the beginning of your next end step.

Whenever a player casts a spell, Spellshock deals 2 damage to that player.

Spikefield Hazard deals 1 damage to any target. If a permanent dealt damage this way would die this turn, exile it instead.

Spiraling Embers deals damage to any target equal to the number of cards in your hand.

Spire Barrage deals damage to any target equal to the number of Mountains you control.

Spit Flame deals 4 damage to target creature.
Whenever a Dragon enters the battlefield under your control, you may pay {R}. If you do, return Spit Flame from your graveyard to your hand.

Spite of Mogis deals damage to target creature equal to the number of instant and sorcery cards in your graveyard. Scry 1.

When Spiteful Banditry enters the battlefield, it deals X damage to each creature.
Whenever one or more creatures your opponents control die, you create a Treasure token. This ability triggers only once each turn.

Flash
Enchant creature
Enchanted creature gets +3/+0 and has first strike.

Spiteful Repossession deals damage to each opponent who controls more lands than you equal to the difference. Then create a number of Treasure tokens equal to the damage dealt this way.

Spitting Earth deals damage to target creature equal to the number of Mountains you control.

Enchant creature
Enchanted creature has "{T}: Create a token that's a copy of this creature, except it has haste. Exile that token at the beginning of the next end step."

Spreading Flames deals 6 damage divided as you choose among any number of target creatures.

Gain control of target creature you don't control until end of turn. Untap that creature. It gains haste until end of turn.
Storm

This spell costs {3} less to cast if you control a Giant.
Squash deals 6 damage to target creature or planeswalker.

Staggershock deals 2 damage to any target.
Rebound