I didn't understand the fangs, either.
Maybe I'm too much of a dork, but what I don't understand is WHY the Emperor would have even had the Sith Wayfinder in a vault just off of his throne room on the new Death Star. He wasn't supposed to be there ("The Emperor is coming here?") and only really showed up to bait the Rebels and Luke to attack it. Why would he have taken his most treasured artifacts and put them in the Death Star (before it was completed, when he wasn't supposed to be there, etc.)?
What would have made more sense to me would have been:
- Ben is spoken to by the Emperor (who tells him how to get to Exegol so they can talk face-to-face)
- Ben tells Rey of Palpatine's existence
- She and the gang travel to the last known location of the Emperor - the Endor system.
- Rey uses the Force (and maybe a JJ vision) to find the throne room in the Death Star wreckage.
- Rey recovers Luke's green lightsaber (that he tossed)
- In the throne room, the Emperor has a log of his travel (or something) that points back to his quarters on Coruscant
- At Coruscant, we find an elaborate room full of Sith artifacts - one of which is the wayfinder.