That, and they were trying to make sure that they wouldn't grab the Elders' attention again.
But I'll need to mark a point in the timeline first, since there could be time dilation going on (crossing universes and dimensions lol). Did the retreat to History Isle and the delivery of the Sheathe to the Gosai Mountains happen during or after the Elder Invasion? Because I'm typing some backstory about the big recall, and how Rona got served by the retreating Teknikans.