I'm not particularly concerned about which. In my opinion multiple ice hells sound redundant. Sort out something. Maybe just blow up half of Kyotos, which would be a sufficient sacrifice while keeping enough of Kyotos remaining for future use if we ever need it again. You can discuss with Trapezoid, for he has a bunch of Ice Demons, and Cyclone who I believe made the place in the first place. I myself don't particularly care, because I have no plans for it. I'm going to be out of contact for four days now, so once you decide whether you blew up Kyotos or Kokytos you can get started.