The Unveiling have vanished from the Puzzlebox, leaving Frostbyte with no way to refuel. Already his regeneration has failed due to Ring depletion. The next step is leprosy, folloed by death. He's re-merged with all but three of his duplicates - the ones most alien to him - so he has some time to spare, but this is no minor concern.
And yet. Solutions abound before him - Parity has offered to transform him to a new form, without dependency on Ring, which he has quietly refused except as last resort, System could probably isolate Ring from his body and synthesize a new supply and he has not gone to (him/her/it), Rinzen could achieve wonders of chemistry to save him - yet he has quietly evaded them all. Why?
Frost [seems to have been cured by, of all people, Ibael]. Wake up, little soldier - it was just a bad dream.