Target opponent exiles the top X cards of their library face down. You may look at and play those cards for as long as they remain exiled. If you cast a spell this way, you may spend mana as though it were mana of any type to cast it.

X target creatures gain islandwalk until end of turn. (They can't be blocked as long as defending player controls an Island.)

Destroy up to X target artifacts and/or enchantments. Create twice X 1/1 black and green Pest creature tokens with "When this creature dies, you gain 1 life."

When Pin Collection enters the battlefield, you may put an ability sticker with ticket cost X or less on it without paying that sticker's ticket cost.

Equipped creature gets +1/+1 and has all abilities of ability stickers on Pin Collection.

Equip

Tap X target creatures. They don't untap during their controllers' next untap steps. (Then exile this card. You may cast the creature later from exile.)

Counter target spell unless its controller pays . If that player doesn't, they tap all lands with mana abilities they control and lose all unspent mana.

Primordial Hydra enters the battlefield with X +1/+1 counters on it.

At the beginning of your upkeep, double the number of +1/+1 counters on Primordial Hydra.

Primordial Hydra has trample as long as it has ten or more +1/+1 counters on it.

Converge — Exile target nonland permanent if its mana value is less than or equal to the number of colors of mana spent to cast this spell.

When Progenitor Exarch enters the battlefield, incubate 3 X times. (To incubate 3, create an Incubator token with three +1/+1 counters on it and ": Transform this artifact." It transforms into a 0/0 Phyrexian artifact creature.)

: Transform target Incubator token you control.

Protean Hydra enters the battlefield with X +1/+1 counters on it.

If damage would be dealt to Protean Hydra, prevent that damage and remove that many +1/+1 counters from it.

Whenever a +1/+1 counter is removed from Protean Hydra, put two +1/+1 counters on it at the beginning of the next end step.

Draw X cards, then discard a card.

Choose one —

• Create an X/1 red Elemental creature token with trample and haste. Sacrifice it at the beginning of the next end step.

• Purphoros's Intervention deals twice X damage to target creature or planeswalker.

Rakdos's Return deals X damage to target opponent or planeswalker. That player or that planeswalker's controller discards X cards.

Vigilance, trample

Rampaging Yao Guai enters the battlefield with X +1/+1 counters on it.

When Rampaging Yao Guai enters the battlefield, destroy any number of target artifacts and/or enchantments with total mana value X or less.

Ravaging Blaze deals X damage to target creature.

Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, Ravaging Blaze also deals X damage to that creature's controller.

Draw X cards. For each card drawn this way, discard a card unless you sacrifice a permanent.

Target opponent reveals their hand. You choose up to X nonland cards from it and exile them. For each card exiled this way, search that player's graveyard, hand, and library for any number of cards with the same name as that card and exile them. Then that player shuffles.

Discard X cards, then return a card from your graveyard to your hand for each card discarded this way. Exile Recall.

Red Sun's Zenith deals X damage to any target. If a creature dealt damage this way would die this turn, exile it instead. Shuffle Red Sun's Zenith into its owner's library.

Return target nonland permanent with mana value X to its owner's hand.

Draw a card.

As an additional cost to cast this spell, sacrifice an artifact.

Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.

Aftermath (Cast this spell only from your graveyard. Then exile it.)

Each opponent loses X life.

When Rocco, Cabaretti Caterer enters the battlefield, if you cast it, you may search your library for a creature card with mana value X or less, put it onto the battlefield, then shuffle.

Rock Slide deals X damage divided as you choose among any number of target attacking or blocking creatures without flying.

Rolling Thunder deals X damage divided as you choose among any number of targets.

You gain twice X life. Put Sanguine Sacrament on the bottom of its owner's library.

Double strike

Savageborn Hydra enters the battlefield with X +1/+1 counters on it.

: Put a +1/+1 counter on Savageborn Hydra. Activate only as a sorcery.

Look at the top X cards of target opponent's library. Exile one of those cards and put the rest back on top of that player's library in any order.

Return X target creatures of the creature type of your choice to their owner's hand.

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

Defender (This creature can't attack.)

Shifting Wall enters the battlefield with X +1/+1 counters on it.

Flying, haste

Shivan Devastator enters the battlefield with X +1/+1 counters on it.

Sigil of Distinction enters the battlefield with X charge counters on it.

Equipped creature gets +1/+1 for each charge counter on Sigil of Distinction.

Equip—Remove a charge counter from Sigil of Distinction.

You may cast Silver Scrutiny as though it had flash if X is 3 or less.

Draw X cards.

Flying

Converge — Skyrider Elf enters the battlefield with a +1/+1 counter on it for each color of mana spent to cast it.

This spell can't be countered. (This includes by the ward ability.)

Target creature gets -X/-X until end of turn.

For each of up to X target creatures, create a red Aura enchantment token named Smoke Blessing attached to that creature. Those tokens have enchant creature and "When enchanted creature dies, it deals 1 damage to its controller and you create a Treasure token."

Create X 1/1 black Rat creature tokens with "This creature can't block." Creatures you control gain haste until end of turn.

Soul Echo enters the battlefield with X echo counters on it.

You don't lose the game for having 0 or less life.

At the beginning of your upkeep, sacrifice Soul Echo if there are no echo counters on it. Otherwise, target opponent may choose that for each 1 damage that would be dealt to you until your next upkeep, you remove an echo counter from Soul Echo instead.

Counter target spell with mana value X. (For example, if that spell's mana cost is , X is 5.)

Sphere of Annihilation enters the battlefield with X void counters on it.

At the beginning of your upkeep, exile Sphere of Annihilation, all creatures and planeswalkers with mana value less than or equal to the number of void counters on it, and all creature and planeswalker cards in graveyards with mana value less than or equal to the number of void counters on it.

Target creature you control deals damage equal to its power to each of X target creatures and/or planeswalkers.

X is the number of artifact and/or creature cards in an opponent's graveyard as you cast this spell.

Distribute X +1/+1 counters among any number of target creatures.

Squall Line deals X damage to each creature with flying and each player.

Steelbane Hydra enters the battlefield with X +1/+1 counters on it.

, Remove a +1/+1 counter from Steelbane Hydra: Destroy target artifact or enchantment.

Return target creature with mana value X to its owner's hand. You create X 1/1 blue Faerie creature tokens with flying.

Bargain (You may sacrifice an artifact, enchantment, or token as you cast this spell.)

Stonesplitter Bolt deals X damage to target creature or planeswalker. If this spell was bargained, it deals twice X damage to that permanent instead.

Target player gains X life.

Multikicker (You may pay an additional any number of times as you cast this spell.)

Choose target creature, then choose another target creature for each time this spell was kicked. Put X +1/+1 counters on each of them.

When Stumpsquall Hydra enters the battlefield, distribute X +1/+1 counters among it and any number of commanders.