Originally posted by carthageBut as we know from Star Wars Fandex:
If Maul gets Nadd's memories he can use Nadd's spells because he'll have absorbed his knowledge of Ancient Sith spells
"A deadly combatant and powerful Sith Lord, Maul spent his entire life in servitude to the dark side of the Force. Taken from his home at a very early age by Darth Sidious, Maul was trained mercilessly in all forms of the Sith arts, becoming the living embodiment of evil."Nadd would probably end up learning a fair bit from Maul, which makes sense. Sidious wouldn't just train a Nadd to do his bidding.