Slay The Spire 2: Eternal Explained
Some cards in Slay the Spire 2 have the Eternal label, which can be confusing the first time you encounter it. Unlike combat mechanics such as Retain or Ethereal, Eternal does not change how a card behaves during a fight. Instead, it affects what happens to the card in your deck for the rest of the run.
What Eternal Does In Slay The Spire 2
Eternal means the card cannot be removed or transformed during the run.
If a card has Eternal, it is permanently locked into your deck. You cannot remove it at shops and events that normally transform cards will not affect it.
Once the card enters your deck, it stays there until the run ends.
Why Eternal Exists
The Eternal mechanic is used for special cards that the game expects you to keep.
These cards may come from events, relic interactions, or certain mechanics tied to characters. Because they are meant to remain part of the run, Eternal prevents players from immediately removing them at a shop.
Sometimes these cards have drawbacks, which makes them more interesting to build around.
How Eternal Affects Your Deck
Since Eternal cards cannot be removed, they permanently increase your deck size.
If the card is strong, this can be helpful because you always keep access to it. If the card has a downside, it can slightly weaken your deck consistency.
Because of this, deciding to accept an Eternal card from an event can sometimes be an important decision.
Eternal Vs Other Similar Mechanics
Eternal is often confused with a few other card mechanics in Slay the Spire 2.
These mechanics do very different things.
Eternal means the card cannot be removed or transformed
Ethereal means the card Exhausts if it remains in your hand at the end of the turn
Retain means the card stays in your hand instead of being discarded
Eternal affects your deck across the entire run, while the others affect what happens during combat.
Final Blurb
Eternal is a simple mechanic in Slay the Spire 2, but it can have a big impact on your deck over the course of a run. Cards with Eternal cannot be removed, which means they stay with you from the moment you gain them.
Because of this, understanding how Eternal works helps you decide when a permanent card is worth adding to your deck.
FAQ
What does Eternal do in Slay The Spire 2
Eternal means a card cannot be removed or transformed during the run.
Can Eternal cards be removed
No. Cards with Eternal cannot be removed at shops or changed by transform events.
Is Eternal the same as Ethereal
No. Eternal affects your deck permanently, while Ethereal causes a card to Exhaust if it remains in your hand at the end of the turn.
Why do some cards have Eternal
Eternal is used on special cards that the game intends to stay in your deck for the rest of the run.
