Toxic Egg

Toxic Egg

Rare
Whenever you add a Skill into your Deck, Upgrade it.

Any Skill you add to your deck arrives upgraded. Card rewards show the upgraded version, the merchant's Skills are upgraded on his shelf, and a Skill added by an event or transform is upgraded as it enters. Skills you already own are not touched. The relic stops being offered from the Act 3 treasure chest onward, floor 41 solo or 38 in multiplayer.

Rarity
Rare
Character
All characters
Shop price
275 gold

When to take Toxic Egg

Take it in Act 1 or 2 for a Skill-heavy character, then spend your Rest Site upgrades on Attacks and Powers instead. By Act 3 it is barely worth a chest slot and never worth the Gold.

Relics that synergize with Toxic Egg

Molten Egg
Molten Egg and Frozen Egg cover the other two types.Whenever you add an Attack card to your Deck, Upgrade it.
Frozen Egg
Molten Egg and Frozen Egg cover the other two types.Whenever you add a Power into your Deck, Upgrade it.
War Paint
War Paint handles the Skills you already had.Upon pickup, Upgrade 2 random Skills.
Orrery
Orrery and Prayer Wheel give more rewards to upgrade.Upon pickup, gain 5 card rewards.
Prayer Wheel
Orrery and Prayer Wheel give more rewards to upgrade.Normal enemies drop an additional card reward.
Dolly's Mirror
Dolly's Mirror copies a Skill with its upgrade.Upon pickup, obtain an additional copy of a card in your Deck.

Changes by version

  1. Changed Old Coin, Molten Egg, Frozen Egg, and Toxic Egg relics: no longer will spawn at the Act 3 chest or later
  2. 20 Nov 2025RarityUncommonRareInternal playtest
    Rarity changed from Uncommon to Rare

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