WARNING!!! SPOILERS FOR The Meeting FOLLOW!!!!!
Rarsan believes that all of Kray's creations are evil; the Dhragolon are merely tools for destroying everything else. He wanted to punish Karrel for being a poor leader by destroying an entire species right in front of him, proving his failure as a king. At the same time, he made a deal with the Grox so that they would not attack the Eteno homeworld and intervene with his schemes. His original intentions were to have the Grox retrieve the Galaxy Buster for him so that he could destroy the galaxy to cleanse of evil. However, Karrel made the mistake of killing him, thus the Grox now have the Galaxy Buster in their hands and threaten to use it for evil intentions.
Fifty years later, he re-appeared on Ucharpli with the intent to harness the power of the bodies of Rustiagon kings passed. However, he changed his plans and worked with the Kklxin to release Uszaroth into our dimension. When Uszaroth was released with Rarsan and Karrel spectating, Rarsan's spirit finally purified. Details are vague about his current whereabouts and activities. However, it is known that he is disliked by many Eteno.