What is Ectoplasm?
Adds energy but prevents future gold gain.
This reference covers gameplay decisions in the original Slay the Spire. Character-specific options and relic synergy can change how useful an item is, so consider your current deck, health, upcoming enemy and available resources before applying a strategy.
When and how to use it
Best when your shopping needs are already limited.
What to avoid
It can make later merchants much less valuable.