As an additional cost to cast this spell, discard X cards.

Look at target opponent's hand and choose X cards from it. That player discards those cards.

Choose one —

• Target player gains X life.

• Prevent the next X damage that would be dealt to any target this turn.

Reveal the top X cards of your library. Put all land cards from among them onto the battlefield tapped and the rest on the bottom of your library in a random order.

Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, untap those lands.

Astral Cornucopia enters the battlefield with X charge counters on it.

: Choose a color. Add one mana of that color for each charge counter on Astral Cornucopia.

Destroy X target snow lands.

Target attacking creature gets +X/+0 until end of turn.

Draw a card at the beginning of the next turn's upkeep.

Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for .)

Target creature gets -X/-X until end of turn. You gain X life.

Put X -1/-1 counters on each creature. Shuffle Black Sun's Zenith into its owner's library.

You may exile a red card with converted mana cost X from your hand rather than pay this spell's mana cost.

Target creature gets +X/+0 until end of turn.

Target player draws X cards. Shuffle Blue Sun's Zenith into its owner's library.

Bonfire of the Damned deals X damage to target player or planeswalker and each creature that player or that planeswalker's controller controls.

Miracle (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

Target player draws X cards.

Briber's Purse enters the battlefield with X gem counters on it.

, , Remove a gem counter from Briber's Purse: Target creature can't attack or block this turn.

Counter target spell unless its controller pays . Clash with an opponent. If you win, that spell's controller puts the top four cards of their library into their graveyard. (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 converted mana cost.)

Burn from Within deals X damage to any target. If a creature is dealt damage this way, it loses indestructible until end of turn. If that creature would die this turn, exile it instead.

The next X damage that would be dealt to target creature, planeswalker, or player this turn is dealt to another target creature, planeswalker, or player instead.

Chimeric Mass enters the battlefield with X charge counters on it.

: Until end of turn, Chimeric Mass becomes a Construct artifact creature with "This creature's power and toughness are each equal to the number of charge counters on it."

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.)

Search your library for a creature card with converted mana cost X or less and put it onto the battlefield. Then shuffle your library.

Counter target spell unless its controller pays .

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

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

Flashback—, Discard X cards. (You may cast this card from your graveyard for its flashback cost. Then exile it.)

( can be paid with either or 2 life.)

Corrosive Gale deals X damage to each creature with flying.

Put target creature or enchantment card from an opponent's graveyard onto the battlefield under your control.

Cut deals 4 damage to target creature.

Target player creates X 2/2 black Zombie creature tokens, then up to one target creature gets -1/-1 until end of turn for each Zombie that player controls.

Each player loses X life, discards X cards, sacrifices X creatures, then sacrifices X lands.

Death Grasp deals X damage to any target. You gain X life.

Each opponent loses two times X life. You gain life equal to the life lost this way.

Search your library for a multicolored card, reveal it, and put it into your hand. Then shuffle your library.

Destroy target artifact with converted mana cost X. It can't be regenerated. Detonate deals X damage to that artifact's controller.

Search your library for up to X cards and put those cards into your hand. Then shuffle your library.

Disintegrate deals X damage to any target. If it's a creature, it can't be regenerated this turn, and if it would die this turn, exile it instead.

You may exile a blue card with converted mana cost X from your hand rather than pay this spell's mana cost.

Counter target spell if its converted mana cost is X.

Prevent the next X damage that would be dealt to you and/or permanents you control this turn. If damage is prevented this way, Divine Deflection deals that much damage to any target.

Spend only black mana on X.

Drain Life deals X damage to any target. You gain life equal to the damage dealt, but not more life than the player's life total before the damage was dealt, the planeswalker's loyalty before the damage was dealt, or the creature's toughness.

Destroy X target nonblack creatures. Draw X cards.

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

Earth deals X damage to each creature without flying.

Delve (Each card you exile from your graveyard while casting this spell pays for .)

Create X tapped 2/2 black Zombie creature tokens.

Enchant creature

Endless Scream enters the battlefield with X scream counters on it.

Enchanted creature gets +1/+0 for each scream counter on Endless Scream.

Sunburst (This enters the battlefield with a charge counter on it for each color of mana spent to cast it.)

, Sacrifice Engineered Explosives: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Engineered Explosives.

Reveal the top X cards of your library. Put all creature cards revealed this way into your hand and the rest on the bottom of your library in any order.

Create X 4/4 white Angel creature tokens with flying.

Miracle (You may cast this card for its miracle cost when you draw it if it's the first card you drew this turn.)

Reveal the top X plus one cards of your library and separate them into two piles. An opponent chooses one of those piles. Put that pile into your hand and the other into your graveyard.

Exile target attacking creature unless its controller pays .

Surge (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)

Fall of the Titans deals X damage to each of up to two targets.

Choose one —

• Each player draws X cards.

• Each player puts the top X cards of their library into their graveyard.

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

: Put a +1/+1 counter on Feral Hydra. Any player may activate this ability.

This spell costs more to cast for each target beyond the first.

Fireball deals X damage divided evenly, rounded down, among any number of targets.

Flaming Gambit deals X damage to target player or planeswalker. That player or that planeswalker's controller may choose a creature they control and have Flaming Gambit deal that damage to it instead.

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

Flip X coins. For each flip you win, create a 2/2 green Sheep creature token named Rabid Sheep.