Something like:
Orc/ATTACH/<xmldeathaction/action/@SETONTHIS/ADD/ScrollOfTranscendence/{RNDLIST,Alchemy,Anatomy,Healing,Stealing}/{RND,1,5}>
You can add as many skills to the RNDLIST as you want, its a randomlist it will pick one from the list, the RND its the minmax value, its random too...