You may pay rather than pay this spell's mana cost. Spend only mana produced by Treasures to cast it this way.

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."

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Whenever you cast a noncreature spell, Seeker of the Way gains lifelink until end of turn.

Whenever one or more creature cards are put into your graveyard from anywhere, venture into the dungeon. This ability triggers only once each turn. (To venture into the dungeon, enter the first room or advance to the next room.)

Create Undead — Whenever you complete a dungeon, return target creature card from your graveyard to the battlefield.

Search your library for any number of nonland cards, exile them, then shuffle.

: Add or .

, , Sacrifice Selesnya Cluestone: Draw a card.

, , Tap an untapped creature you control: Create a 1/1 green Saproling creature token.

: Create a 1/1 green Saproling creature token.

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

: Add or .

, , Sacrifice Selesnya Locket: Draw two cards.

Selesnya Sanctuary enters tapped.

When Selesnya Sanctuary enters, return a land you control to its owner's hand.

: Add .

, : Add .

Enchant creature

Enchanted creature gets -3/-0.

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.

Flash

This spell costs less to cast for each creature attacking you.

When Sentry Bot enters, you get for each creature attacking you.

At the beginning of combat on your turn, you may pay . If you do, put a +1/+1 counter on each creature you control.

Flying, vigilance

, Pay 3 life: Regenerate Sentry of the Underworld.

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.)

When Seraph Sanctuary enters, you gain 1 life.

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

: Add .

Krakens, Leviathans, Octopuses, and Serpents you control can't be blocked except by Krakens, Leviathans, Octopuses, and Serpents.

Enchant creature

At the beginning of your upkeep, sacrifice Serra Bestiary unless you pay .

Enchanted creature can't attack or block, and its activated abilities with in their costs can't be activated.

At the beginning of your upkeep, you may put a verse counter on Serra's Hymn.

Sacrifice Serra's Hymn: Prevent the next X damage that would be dealt this turn to any number of targets, divided as you choose, where X is the number of verse counters on Serra's Hymn.

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

Vigilance, haste

Flying, haste

Gain control of target creature until end of turn. Untap that creature. Until end of turn, it gains haste and "Whenever this creature deals damage, destroy target Equipment attached to it."

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

Domain — Look at the top X cards of your library, where X is the number of basic land types among lands you control. Put up to two of them into your hand and the rest into your graveyard. You lose 2 life.

When Shady Informant dies, it deals 2 damage to any target.

Disguise (You may cast this card face down for as a 2/2 creature with ward . Turn it face up any time for its disguise cost.)

When this creature enters, creatures you control get +1/+1 until end of turn.

Flying

You, planeswalkers you control, and other creatures you control have hexproof.

: Put a +1/+1 counter on each creature you control.

: Add two mana in any combination of colors. Spend this mana only to cast creature spells.

Formidable — , : Each player's life total becomes the number of creatures they control. Activate only if creatures you control have total power 8 or greater.

Shanna, Sisay's Legacy can't be the target of abilities your opponents control.

Shanna gets +1/+1 for each creature you control.

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

Whenever a creature you control attacks, it gets +1/+0 until end of turn for each other attacking creature that shares a creature type with it.

Whenever you cast a noncreature spell, create an X/X blue Shark creature token with flying, where X is that spell's mana value.

Cycling (, Discard this card: Draw a card.)

When you cycle Shark Typhoon, create an X/X blue Shark creature token with flying.

Vigilance

Whenever a creature you control enters, if its power is greater than Sharp-Eyed Rookie's power or its toughness is greater than Sharp-Eyed Rookie's toughness, put a +1/+1 counter on Sharp-Eyed Rookie and investigate. (Create a Clue token. It's an artifact with ", Sacrifice this artifact: Draw a card.")

Return X target creature cards from your graveyard to your hand. You lose X life.

Whenever you attack, you may create a tapped and attacking token that's a copy of target attacking legendary creature you control other than Shaun, except it's not legendary and it's a Synth artifact creature in addition to its other types.

When Shaun leaves the battlefield, exile all Synth tokens you control.

Enchant creature you control

When Sheltered by Ghosts enters, exile target nonland permanent an opponent controls until Sheltered by Ghosts leaves the battlefield.

Enchanted creature gets +1/+0 and has lifelink and ward .

Basic lands each player controls have shroud as long as that player controls three or fewer lands. (They can't be the targets of spells or abilities.)

Enchant creature

Enchanted creature has indestructible.

Whenever a creature enters, you may attach Shielded by Faith to that creature.

As Shifting Sky enters, choose a color.

All nonland permanents are the chosen color.

, , Return Shigeki, Jukai Visionary to its owner's hand: Reveal the top four cards of your library. You may put a land card from among them onto the battlefield tapped. Put the rest into your graveyard.

Channel — , Discard Shigeki: Return X target nonlegendary cards from your graveyard to your hand.

Look at the top four cards of your library. Put one of them into your hand and the rest on the bottom of your library in a random order.

Enchant creature

Enchanted creature gets +2/+2 and is goaded. (It attacks each combat if able and attacks a player other than you if able.)

Whenever enchanted creature attacks, you create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Defender

As long as an artifact entered the battlefield under your control this turn, Shipwreck Sentry can attack as though it didn't have defender.

Exile up to four target cards from a single graveyard.

Transmute (, Discard this card: Search your library for a card with the same mana value as this card, reveal it, put it into your hand, then shuffle. Transmute only as a sorcery.)

Survival — At the beginning of your second main phase, if Shrewd Storyteller is tapped, put a +1/+1 counter on target creature.

At the beginning of your upkeep and whenever you cast a white spell, put a charge counter on Shrine of Loyal Legions.

, , Sacrifice Shrine of Loyal Legions: Create a 1/1 colorless Phyrexian Myr artifact creature token for each charge counter on Shrine of Loyal Legions.