Creatures without flying can't block this turn.

Seismic Wave deals 2 damage to any target and 1 damage to each nonartifact creature target opponent controls.

Untap target creature. After this main phase, there is an additional combat phase followed by an additional main phase.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

This spell costs less to cast if you've committed a crime this turn. (Targeting opponents, anything they control, and/or cards in their graveyards is a crime.)

Draw two cards.

As an additional cost to cast this spell, discard a card.

Draw two cards and create a Treasure token. (It's an artifact with ", Sacrifice this token: Add one mana of any color.")

Create a red Elemental creature token with trample and "This creature's power and toughness are each equal to the number of instant and sorcery cards in your graveyard plus the number of cards with flashback you own in exile."

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Enchant creature

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

As long as you control a Plains, Sejiri Merfolk has first strike and lifelink. (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

Target creature you control gains protection from the color of your choice until end of turn.

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.

Reveal the top seven cards of your library. Choose from among them a card with flying, a card with first strike, and so on for double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance. Put one of the chosen cards onto the battlefield, the other chosen cards into your hand, and the rest into your graveyard.

Each player chooses a color. Then exile each permanent unless it's colorless or it's only the color its controller chose.

Flying

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

This land enters tapped.

: Add or .

Reach (This creature can block creatures with flying.)

Selesnya Sagittars can block an additional creature each combat.

Search your library for a basic land card and reveal it. If there's a tree in its art, put it onto the battlefield tapped. Otherwise, put it into your hand. Then shuffle.

: Exile target creature card from a graveyard. That card deals damage equal to its power to Selfless Exorcist.

Sacrifice Selfless Savior: Another target creature you control gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

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.

Whenever Selhoff Occultist or another creature dies, target player mills a card.

When Seller of Songbirds enters, create a 1/1 white Bird creature token with flying.

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.

At the beginning of your upkeep, choose target opponent. This turn, that player can't cast spells or activate abilities and plays with their hand revealed. You may play lands and cast spells from that player's hand this turn.

Flying

When Senate Griffin enters, scry 1.

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

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

Flying

Whenever one or more other creatures die, put a +1/+1 counter on Sengir Connoisseur. This ability triggers only once each turn.

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

Whenever a creature dealt damage by Sengir Vampire this turn dies, put a +1/+1 counter on Sengir Vampire.

Kinship — At the beginning of your upkeep, you may look at the top card of your library. If it shares a creature type with Sensation Gorger, you may reveal it. If you do, each player discards their hand, then draws four cards.

: Look at the top three cards of your library, then put them back in any order.

: Draw a card, then put Sensei's Divining Top on top of its owner's library.

Enchant creature

Enchanted creature gets -3/-0.

When Sentinel of Lost Lore enters, choose one or more —

• Return target card you own in exile that has an Adventure to your hand.

• Put target card you don't own in exile that has an Adventure on the bottom of its owner's library.

• Exile target player's graveyard.

Vigilance

Whenever Sentinel of the Nameless City enters or attacks, create a Map token. (It's an artifact with ", , Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery.")

Haste

As long as an artifact entered the battlefield under your control this turn, creatures you control get +2/+2.

Battalion — Whenever Sentinel Sarah Lyons and at least two other creatures attack, Sentinel Sarah Lyons deals damage equal to the number of artifacts you control to target player.

Vigilance, reach

Whenever an instant or sorcery spell is cast during your turn, Sentinel Tower deals damage to any target equal to 1 plus the number of instant and sorcery spells cast before that spell this turn.

Flash

Enchant creature

Enchanted creature gets +1/+2 and has vigilance.

Addendum — When Sentinel's Mark enters, if you cast it during your main phase, enchanted creature gains lifelink until end of turn.

When Separatist Voidmage enters, you may return target creature to its owner's hand.

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.

Flying

Whenever Seraph of New Phyrexia attacks, you may sacrifice another creature or artifact. If you do, Seraph of New Phyrexia gets +2/+1 until end of turn.

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.

Destroy target enchantment. You gain life equal to its mana value.

When Serpent Assassin enters, you may destroy target nonblack creature.

Flash

Enchant creature

Enchanted creature gets +1/+1.

: Regenerate enchanted creature.

Backup 1 (When this creature enters, put a +1/+1 counter on target creature. If that's another creature, it gains the following ability until end of turn.)

Deathtouch

Until end of turn, target creature becomes a blue Serpent with base power and toughness 5/5.

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.

Devoid (This card has no color.)

Serpentine Spike deals 2 damage to target creature, 3 damage to another target creature, and 4 damage to a third target creature. If a creature dealt damage this way would die this turn, exile it instead.

Creatures with flying get +1/+1.

Flying, first strike

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