Ok, I am looking for a ruling on if the copies of Dragonstorm can be countered if Overmaster was cast just before. It seems to me like they should not be able to be countered because they are copies of a spell that cannot be countered. My understanding of Overmaster is that it essentially adds the "cannot be countered" text to the next instant or sorcery cast. If that is the case, then it seems like the respective copies should also have this text modification as they were copied after it was added (when Dragonstorm was cast). Of course I'm not a judge and this is just conjecture on my part. In any case, I appreciate any insight any of you may have into this ruling.
Much appreciated,
IAmTheSharkMan
Thank you,
IAmTheSharkMan