Defender

At the beginning of combat on your turn, you may clash with an opponent. If you win, Sentry Oak gets +2/+0 and loses defender until end of turn. (Each clashing player reveals the top card of their library, then puts that card on the top or bottom. A player wins if their card had a higher mana value.)

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.

You may pay and tap four untapped creatures you control with flying rather than pay this spell's mana cost.

Flying, lifelink

Other creatures you control with flying have indestructible. (Damage and effects that say "destroy" don't destroy them.)

Sacrifice another creature: Sepulcher Ghoul gets +2/+2 until end of turn. Activate only once each turn.

Flying

Whenever a creature dealt damage by Seraph this turn dies, put that card onto the battlefield under your control at the beginning of the next end step. Sacrifice the creature when you lose control of Seraph.

Flying

: Transform Seraph of New Capenna. Activate only as a sorcery. ( can be paid with either or 2 life.)

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.)

Flying

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

Flying

Indestructible (Damage and effects that say "destroy" don't destroy this creature. If its toughness is 0 or less, it's still put into its owner's graveyard.)

First strike, lifelink

Whenever Seraphic Steed attacks while saddled, create a 3/3 white Angel creature token with flying.

Saddle 4 (Tap any number of other creatures you control with total power 4 or more: This Mount becomes saddled until end of turn. Saddle only as a sorcery.)

Flying

At the beginning of your upkeep, Serendib Efreet deals 1 damage to you.

Whenever Serene Master blocks, exchange its power and the power of target creature it's blocking until end of combat.

Whenever you gain life, you may pay . If you do, put a +1/+1 counter on target creature.

Kicker (You may pay an additional as you cast this spell.)

When Sergeant-at-Arms enters the battlefield, if it was kicked, create two 1/1 white Soldier creature tokens.

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.

When Serpent Warrior enters the battlefield, you lose 3 life.

Landfall — Whenever a land enters the battlefield under your control,

Augment (, Reveal this card from your hand: Combine it with target host. Augment only as a sorcery.)

: Serpentine Kavu gains haste until end of turn.

Flying, vigilance

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.

Flying, first strike

Whenever you cast a historic spell, Serra Disciple gets +1/+1 until end of turn. (Artifacts, legendaries, and Sagas are historic.)

Whenever Serra Inquisitors blocks or becomes blocked by one or more black creatures, Serra Inquisitors gets +2/+0 until end of turn.

Flying

Once during each of your turns, you may play a land from your graveyard or cast a permanent spell with mana value 3 or less from your graveyard. If you do, it gains "When this permanent is put into a graveyard from the battlefield, exile it and you gain 2 life."

Flying, vigilance

Flying

As Serra's Emissary enters the battlefield, choose a card type.

You and creatures you control have protection from the chosen card type.

: Put a -1/-1 counter on Serrated Biskelion and a -1/-1 counter on target creature.

Flying

When Serum Raker dies, each player discards a card.

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

Exalted (Whenever a creature you control attacks alone, that creature gets +1/+1 until end of turn.)

Servant of the Scale enters the battlefield with a +1/+1 counter on it.

When Servant of the Scale dies, put X +1/+1 counters on target creature you control, where X is the number of +1/+1 counters on Servant of the Scale.

Inspired — Whenever Servant of Tymaret becomes untapped, each opponent loses 1 life. You gain life equal to the life lost this way.

: Regenerate Servant of Tymaret.

Other Snake creatures you control get +2/+2.

Whenever a Snake you control deals combat damage to a player, you may draw a card.

Heroic — Whenever you cast a spell that targets Setessan Battle Priest, you gain 2 life.

Flying

: Setessan Griffin gets +2/+2 until end of turn. Activate only once each turn.

When Setessan Petitioner enters the battlefield, you gain life equal to your devotion to green. (Each in the mana costs of permanents you control counts toward your devotion to green.)

When Setessan Starbreaker enters the battlefield, you may destroy target Aura.

Tap an untapped Druid you control: Add .

When Settlement Blacksmith enters the battlefield, if you control an Equipment, draw a card.

When Seven-Tail Mentor enters the battlefield or dies, put a +1/+1 counter on target creature or Vehicle you control.

Prevent all damage that would be dealt to Sevinne, the Chronoclasm.

Whenever you cast your first instant or sorcery spell from your graveyard each turn, copy that spell. You may choose new targets for the copy.

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.

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)

Scavenge (, Exile this card from your graveyard: Put a number of +1/+1 counters equal to this card's power on target creature. Scavenge only as a sorcery.)

Flying, haste

Whenever you cast your second spell each turn, choose target creature an opponent controls. If it's tapped, put a stun counter on it. Otherwise, tap it. (If a permanent with a stun counter would become untapped, remove one from it instead.)

: Shade of Trokair gets +1/+1 until end of turn.

Suspend 3— (Rather than cast this card from your hand, you may pay and exile it with three time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)

Whenever another black creature enters the battlefield under your control, target creature gains intimidate until end of turn. (It can't be blocked except by artifact creatures and/or creatures that share a color with it.)

, : Put target creature you control on top of its owner's library.

, : Shadow Guildmage deals 1 damage to any target and 1 damage to you.

If your life total is less than your starting life total, this spell costs less to cast, where X is the difference.

Flanking <I>(Whenever a creature without flanking blocks this creature, the blocking creature gets -1/-1 until end of turn.)</I>

Tap another untapped Rogue you control: Shadow Stinger gains deathtouch until end of turn.

Whenever Shadow Stinger deals combat damage to a player, that player mills three cards. (They put the top three cards of their library into their graveyard.)

Flying

When Shadowborn Demon enters the battlefield, destroy target non-Demon creature.

At the beginning of your upkeep, if there are fewer than six creature cards in your graveyard, sacrifice a creature.