Learning and forgetting skills
Characters learn skills through skill books; forgetting one frees its slot, but learning it again requires another copy of its associated book.
How it works
The source says skill books can be purchased from vendors or found in loot. A character may forget a skill, freeing the slot it occupied. Reacquiring a forgotten skill requires finding another copy of its associated book. The passage does not specify prices, particular vendors, loot sources, or locations.
Read the supporting references
Source-bounded reference to skill learning, tiers, ability progression, skill requirements, and weapon abilities. Skill names without described effects are omitted except where used as a documented tier or requirement example. The supplied passages do not describe talents or equipment item effects. Guidance explains the referenced mechanics; it is not a tested damage ranking. Check the stated edition and source version before applying a patch-specific detail.