I know about doPlayerSetLossPercent, but this set to all skills and I need to specific skills.
I saw doPlayerSetLossSkill, can use this one like: doPlayerSetLossSkill(cid, SKILL_AXE, 0)?
Thanks in advance.
So it's not likely the function you are looking for.
I'm not the best at old TFS but I would assume you would have to do a source edit within the function Player::onDeath() or you could edit the original setLossSkill function to be able to set it the way you want.