I just can't figure out right now if Tomb Guards are able to gain exp and therefore can become heroes with the lad's got talent. The No Brain rule states that skeleton are not alive, and thus never gain experience. There's a note about tomb lords, acolytes and liche priests but nothing about tomb guards.
I think that the no brain rule just counts for skeleton warriors as otherwise there wouldn't be any way to get more heros but need your help to make sure.
thx in advance.