Speaking of mythril, I forget if it's been said here, but soon (next fest???) they're going to introduce a mechanic where if you pull multiple times on the same banner (or maybe same event? I seem to recall for the fest itself it's *all* the fest banners) you get rewards, ending after 10 pulls in picking any one of the banner items.
Long story short, really really want that sync? Spend 500 mythril on the banner, select the sync.
EDIT: Found deets
https://gamefaqs.gamespot.com/boards...eeper/78785652