I think you ppl aren't realizing the elephant in the room, which allowed that twinning of time to exist in the first place which is the fractured dimension in which Etheirys exists. My 2 cents is that they'll make so that only trough there you can actually change time because time itself is wonky between source and shards yet interlinked in some way (Remember for Cylva as soon as the 13th fell she was sent to the 1st and I doubt she's the worst underling of the century that took 10k+ years to do Loghrif's and Mitron's bidding)