Your Mercenaries Don't Pick Their Skills — They Earn Them in Battle feature - Mercenary Brotherhood (opens in new tab)

In Mercenary Brotherhood skills are not all planned at level 1. Every mercenary's abilities are forged by what they actually do in combat, so the game only ever offers them the skills they've trained for. Follow one goblin recruit from his first nervous knife-fight to a level-10 backstabber, and see how skill trees, traits, and abilities grow out of how you play.