Grim Dawn · Progression mechanic
Mastery investment and skill-point changes
Mastery investment unlocks skills and supplies base attributes, health, and energy; skill points can be reset for a fee, but Mastery-bar points cannot be removed.
How it works
The compendium says characters select a first class at level 2 and may select a second at level 10. Investing skill points into a class mastery unlocks skills, with more skills available as more Mastery points are invested; Mastery investment also grants base attributes, health, and energy. The official guide says a Spirit Guide can unlearn skill points for a fee, but not points in the Mastery bar. The compendium separately says chosen Masteries cannot be changed.
Read the supporting references
Check the edition and source version for patch-specific details. Guide methodology.