Who do you think is Ras' Master?

I mean, we don't know anything about them, except that they use a type of 'golden light'. My theory is an eighth Source Dragon, or another being on the same level, who wants the Realms to unmerge. Otherwise, they would have no reason to try and make Ras collect Dragon Icons. It is also stated that they want power, so collecting Dragon Icons would give them that power. I don't know about the golden light though, cause that seems like Golden Power, which comes from the Source Dragons...