Simply can't remember the name. He gets abandoned by his team mates and then fed on by some huge fly monsters larvae. As he is about to die he unlocks his abilities and is able to consume skill points from killing things.... which is somehow different than leveling normally. I remember he tamed a dragon or like one of those lower fair dragon types. Part of his revenge is stealing the main leader of his old teams women. If anyone could help me. That would be great.
Maybe look for Netori Tag. If there is the Stealing of a Woman with a Boyfriend/Husband then there should be Netori tag.