Skill trainer

Basics
A Skill Trainer is an NPC who can teach new skills to player characters.

Learning a skill from a skill trainer costs one skill point and some gold. The price in gold starts at 20g and increases by 10g for every additional skill you buy.

When you talk to a Skill Trainer a menu will pop up to show you which skills he has available and which of them you already know (greyed out).

All Skill Trainers except the ones in Ascalon and the Northern Shiverpeaks also offer the Signet of Capture. Note that at any time a Signet of Capture cost only half as much as any other skill.

Dakk the skill trainer at Ember Light Camp sells every non-elite skill, making completing a character's skill-set easier.

Trainer Locations
For an overview of the locations and available skills of all Skill Trainers see
 * here (in list format) or
 * here (in table format).