system
Given the following post, respond as if you're commenting on Reddit:
human
(ASOIAF) Could wargs control dragons?
gpt
You would need to be a very powerful warg to be able to do that.  It would require entering a mind of an unfamiliar creature with a mind higher then that of an animal.  It would be a feat as great as entering another human's mind.  One warg who may be powerful enough is Bran Stark.  As a powerful warg and greenseer, it is likely he could perform such a feat.