Look at the top three cards of your library. Put one of those cards into your hand and the rest on the bottom of your library in any order. If this spell was cast from anywhere other than your hand, put each of those cards into your hand instead.

Reach

When Seed Guardian dies, create an X/X green Elemental creature token, where X is the number of creature cards in your graveyard.

When Seedguide Ash dies, you may search your library for up to three Forest cards, put them onto the battlefield tapped, then shuffle.

Choose one at random —

• You get an emblem with "At the beginning of your upkeep, pay . If you don't, you lose the game."

• Each player discards their hand.

• Planeswalk to Pools of Becoming. (Once there, you can roll the planar die only if you're playing Planechase.)

• For each opponent, exile cards from the top of their library until you exile a nonland card. You may cast those cards without paying their mana costs.

• Destroy all creatures and non-Bolas planeswalkers.

• You get an emblem with "You can cast nonland cards from your sideboard."

Mill seven cards. Then put all cards that have an Adventure from among the milled cards into your hand.

When Seekers' Squire enters, it explores. (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.)

Whenever Segmented Wurm becomes the target of a spell or ability, put a -1/-1 counter on it.

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.)

Seismic Shudder deals 1 damage to each creature without flying.

Destroy target nonwhite, nonblack creature. Create a 1/1 white Spirit creature token with flying.

Haunt (When this spell card is put into a graveyard after resolving, exile it haunting target creature.)

When the creature Seize the Soul haunts dies, destroy target nonwhite, nonblack creature. Create a 1/1 white Spirit creature token with flying.

Enchant creature

Whenever enchanted creature becomes tapped, Seizures deals 3 damage to that creature's controller unless that player pays .

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.

: Add or .

, , Sacrifice Selesnya Cluestone: Draw a card.

Selesnya Guildgate enters tapped.

: Add or .

: Add or .

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

Target opponent sacrifices a green or white creature. If that player does, they lose 2 life.

Flash

When Selfless Squire enters, prevent all damage that would be dealt to you this turn.

Whenever damage that would be dealt to you is prevented, put that many +1/+1 counters on Selfless Squire.

When Sell-Sword Brute dies, it deals 2 damage to you.

Flying

: Senate Courier gains vigilance until end of turn.

When Sengir Autocrat enters, create three 0/1 black Serf creature tokens.

When Sengir Autocrat leaves the battlefield, exile all Serf tokens.

Flying

, Exile Sengir Nosferatu: Create a 1/2 black Bat creature token with flying. It has ", Sacrifice this creature: Return an exiled card named Sengir Nosferatu to the battlefield under its owner's control."

Flying, vigilance

, Exile Senu, Keen-Eyed Protector: You gain 2 life and scry 2.

When a legendary creature you control attacks and isn't blocked, if Senu is exiled, put it onto the battlefield attacking.

Intimidate (This creature can't be blocked except by artifact creatures and/or creatures that share a color with it.)

When Sepulchral Primordial enters, for each opponent, you may put up to one target creature card from that player's graveyard onto the battlefield under your control.

: Add .

, , Sacrifice Sequestered Stash: Mill five cards. Then you may put an artifact card from your graveyard on top of your library.

When Seraph Sanctuary enters, you gain 1 life.

Whenever an Angel you control enters, you gain 1 life.

: Add .

Prevent all combat damage X target creatures would deal this turn.

Create a 0/0 green and blue Fractal creature token. Put X +1/+1 counters on it, where X is one plus the total number of instant and sorcery cards you own in exile and in your graveyard.

Whenever an Elf you control dies, exile it.

, Pay 2 life: Until end of turn, you may cast a creature spell from among cards exiled with Serpent's Soul-Jar.

Flying (This creature can't be blocked except by creatures with flying or reach.)

Vigilance (Attacking doesn't cause this creature to tap.)

Other creatures you control have vigilance.

: Add for each enchantment you control.

Flying

When Serum Raker dies, each player discards a card.

Flying

Whenever you cast a noncreature spell, put an oil counter on Serum Sovereign.

, Remove an oil counter from Serum Sovereign: Draw a card, then scry 2.

When Serum Visionary enters, draw a card, then scry 2.

Flying

Whenever you cast a noncreature spell, put an oil counter on Serum-Core Chimera.

Remove three oil counters from Serum-Core Chimera: Draw a card. Then you may discard a nonland card. When you discard a card this way, Serum-Core Chimera deals 3 damage to target creature or planeswalker. Activate only as a sorcery.

Whenever Sethron, Hurloon General or another nontoken Minotaur you control enters, create a 2/3 red Minotaur creature token.

: Minotaurs you control get +1/+0 and gain menace and haste until end of turn. ( can be paid with either or .)

Destroy target nonblack creature. It can't be regenerated. You gain life equal to its toughness.

Flying

Whenever another creature you control with flying dies, put a +1/+1 counter on target creature you control.

( can be paid with either or .)

Players can't search libraries this turn.

Draw a card.

Flying, ward

When Shadow Puppeteers enters, create two 1/1 black Faerie Rogue creature tokens with flying.

Whenever a creature you control with flying attacks, you may have it become a red Dragon with base power and toughness 4/4 in addition to its other colors and types until end of turn.

, , Sacrifice another creature: Draw X cards, where X is that creature's power.

Choose a Background (You can have a Background as a second commander.)

Shake the Foundations deals 1 damage to each creature without flying.

Draw a card.

Haste

Whenever a creature you control deals combat damage to a player, put a +1/+1 counter on it.

Ferocious — : Draw a card for each creature you control with power 4 or greater.

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

Lifelink

At the beginning of your end step, you may pay . If you do, draw X cards. X can't be greater than the amount of life you gained this turn.

, : Target creature gains first strike until end of turn.

, : Target creature gets +1/+0 until end of turn.

Whenever a creature you control becomes the target of a spell or ability an opponent controls, you may draw a card.

Flash

Enchant creature you control

As long as Shardmage's Rescue entered this turn, enchanted creature has hexproof.

Enchanted creature gets +1/+1.

Join forces — Starting with you, each player may pay any amount of mana. Each player mills X cards, where X is the total amount of mana paid this way.

Flying

When Sharuum the Hegemon enters, you may return target artifact card from your graveyard to the battlefield.

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for or one mana of that creature's color.)

Choose one —

• Shatter the Source deals 6 damage to target creature, planeswalker, or battle.

• Destroy target artifact.