Very quick post since this could change at any time.
There are lots of methods to get the new Crystal Sand needed for the Anima questline for the relic. The easiest is a 1 for 1 trade of one sand for one amber encased vilekin. These drop on every 3rd or 4th levequest.
So do the following:
>Pick up a levequest from Ishgard for the Dravanian Highlands
>Go start it, look around and if there is a chest loot it
>Either way abandon it and restart it and search again
>Repeat until you exhaust your leve allowances.
At a possible 20 in 30 minutes thats a small chunk of the 250 needed for the Relic done very easily, have fun!