Chemical X

Chemical X

Shop
The effects of your cost X cards are increased by 2.

WARNING: Do not combine with sugar, spice, and everything nice.

Chemical X adds 2 to the X of any card with an X Energy cost or an X Star cost, after you pay. Spend 0 and X is 2; spend 3 and X is 5. Only your own cards get the bonus; the relic flashes each time one is played. It is a Shop relic at 200 gold.

Rarity
Shop
Character
All characters
Shop price
200 gold

When to take Chemical X

Buy it when your deck holds at least two X-cost cards you already want to play, three makes it a build. Fits best after Act 1, once you can afford big X payments.

Cards that synergize with Chemical X

Heavenly Drill
Attack
X
Deal 8 damage X times.
Double X if it's 4 or more.
Heavenly Drill doubles X at 4 or more, so paying 2 becomes 8 hits.Deal 8 damage X times.
Double X if it's 4 or more.
Whirlwind
Attack
X
Deal 5 damage to ALL enemies X times.
Whirlwind and Skewer gain two free swings.Deal 5 damage to ALL enemies X times.
Skewer
Attack
X
Deal 8 damage X times.
Whirlwind and Skewer gain two free swings.Deal 8 damage X times.
Multi-Cast
Skill
X
Evoke your rightmost Orb X times.
Multi-Cast evokes twice more.Evoke your rightmost Orb X times.
Malaise
Skill
X
Enemy loses X Strength. Apply X Weak.
Exhaust.
Malaise strips 2 more Strength and applies 2 more Weak.Enemy loses X Strength. Apply X Weak.
Exhaust.
Stardust
Attack
0
Deal 5 damage to a random enemy X times.
Stardust uses a Star X and gets the same bonus.Deal 5 damage to a random enemy X times.

Relics that synergize with Chemical X

Chandelier
Chandelier gives the Energy to pay X large.At the start of your 3rd turn, gain .

Changes by version

  1. 20 Nov 2025AddedInternal playtest
    Added a returning relic from StS1, Chemical X

Internal playtest notes are from before the Early Access release. Names and numbers in them can differ from the game today.

Purchase today
If you haven't bought Slay The Spire 2 yet, it's time. Support the devs, they made an amazing game.Get it on Steam