if there is a glitch to walk underwater and then you use the portable pylon thing to teleport back underwater if it doesn't work the first time then i feel like there might be some no-sense workaround like in genshin (you could pug out wifi, walk, pause, plug in wifi, walk, and repeat when inside the barrier underwater to get into Inazuma without the quest) would be real cool if you could find a underwater walking glitch that doesn't require a gulpuf challenge to not have already been used by a hypothetical player who wont do the rank up quest, ha ha ha.....