: Target land becomes the basic land type of your choice until end of turn.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)

Flash

Whenever this creature deals combat damage to a player, draw a card.

Sacrifice Seal of Doom: Destroy target nonblack creature. It can't be regenerated.

As Seal of the Guildpact enters, choose two colors.

Each spell you cast costs less to cast for each of the chosen colors it is.

Morbid — At the beginning of each end step, if a creature died this turn, put a soul counter on Séance Board.

: Add X mana of any one color, where X is the number of soul counters on Séance Board. Spend this mana only to cast instant, sorcery, Demon, and Spirit spells.

Whenever you gain life, you may pay . If you do, Searing Meditation deals 2 damage to any target.

Seaside Citadel enters tapped.

: Add , , or .

Choose up to five worth of modes. You may choose the same mode more than once.

— Create a tapped Treasure token.

— Exile the top two cards of your library. Until the end of your next turn, you may play them.

— Until the end of your next turn, whenever you cast a spell, Season of the Bold deals 2 damage to up to one target creature.

Lifelink

When Seasoned Dungeoneer enters, you take the initiative.

Whenever you attack, target attacking Cleric, Rogue, Warrior, or Wizard gains protection from creatures until end of turn. 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 the creature, then put the card back or put it into your graveyard.)

Whenever Seasoned Marshal attacks, you may tap target creature.

, 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.

Tasty (This creature can be attacked directly. If it is attacked, it can't block creatures that didn't attack it.)

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.)

At the beginning of your upkeep, if you have 5 or less life, sacrifice Second Chance and take an extra turn after this one.

For each token you control, create a token that's a copy of that permanent.

Each player returns to the battlefield all artifact, creature, enchantment, and land cards in their graveyard that were put there from the battlefield this turn.

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.)

Whenever you cast a spell from your graveyard, draw a card.

Squad (As an additional cost to cast this spell, you may pay any number of times. When this creature enters, create that many tokens that are copies of it.)

Vigilance

Whenever a creature token you control enters, put a +1/+1 counter on it.

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

All Sliver creatures have "This creature gets +1/+1 as long as you control a Swamp."

All Slivers have ": Regenerate this permanent." (The next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Menace

Ward—Pay 3 life. (Whenever this creature becomes the target of a spell or ability an opponent controls, counter it unless that player pays 3 life.)

Magecraft — Whenever you cast or copy an instant or sorcery spell, create a 1/1 black and green Pest creature token with "When this creature dies, you gain 1 life."

Flying

Whenever Sedraxis Specter deals combat damage to a player, that player discards a card.

Unearth (: Return this card from your graveyard to the battlefield. It 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 two cards, then shuffle a card from your hand into your library.

Enchant creature

Enchanted creature gets +2/+1 and has first strike.

At the beginning of your end step, if you didn't attack with a creature this turn, sacrifice See Red.

Mill two cards. You may put a permanent card from among the milled cards into your hand. You gain 2 life. (To mill two cards, put the top two cards of your library into your graveyard.)

Whenever a land enters, its controller creates a 1/1 green Snake creature token.

: Target creature gets +3/+3 until end of turn. Untap that creature.

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

When Seedpod Caretaker enters, choose one —

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

• Transform target Incubator token you control.

Destroy all artifacts. They can't be regenerated. The controller of each of those artifacts gains life equal to its mana value.

Target creature gets +1/+1 until end of turn.

Target creature gets +1/+1 until end of turn.

Target creature gets +1/+1 until end of turn.

Search target opponent's library for a card and exile it. You gain life equal to its mana value. Then that player shuffles.

Exile the top two cards of your library. Until your next end step, you may play those cards.

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

: 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.)

Megamorph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its megamorph cost and put a +1/+1 counter on it.)

Seismic Shudder deals 1 damage to each creature without flying.

This spell costs less to cast if it targets a tapped creature.

Destroy target creature.

Whenever another nontoken creature you control dies, create a 3/1 black and red Graveborn creature token with haste.

Flying

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

: Create a 1/1 green Saproling creature token.

: Creatures you control get +1/+1 until end of turn.

When Selkie Hedge-Mage enters, if you control two or more Forests, you may gain 3 life.

When Selkie Hedge-Mage enters, if you control two or more Islands, you may return target tapped creature to its owner's hand.

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

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.

Exile any number of target creatures and/or planeswalkers you control. At the beginning of the next end step, return each of them to the battlefield under its owner's control. Each of them enters with an additional +1/+1 counter on it if it's a creature and an additional loyalty counter on it if it's a planeswalker.

Tap up to two target creatures.

Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, those creatures don't untap during their controllers' next untap steps.