The flask
Your health flask holds a set number of charges. Each charge restores a slice of your maximum health.
Charges refill when you enter a new biome. Some rooms hold a fountain that refills them mid-biome.
Upgrade the flask
The Collector sells extra charges for cells. Each upgrade raises how many heals you carry.
That upgrade outlasts any single weapon. It pays off on every future run.
When to heal
Heal between fights, not during them. A heal traded for a hit often leaves you worse off.
Running low matters more than being full. Save a charge for the boss ahead.
Health from stats
Survival scrolls raise your health the most, so a green build tolerates more mistakes. A purple build must avoid damage or die.
Next: Brutality vs Tactics vs Survival and Parry and timing.