It drops out of the sky while the great animal glides peacefully overhead. Killing a Starwhale never gives you one.
Watch the sky when a whale passes and follow it for a while if you can; that is the only way to get one. It has no recipe yet, but it is one of the rarest things in the Astral Sea.
More from the archive
ItemAmber FeatherA small feather the colour of warm amber, shed by the Amber Pips that scurry through the Highland grass.
ItemRaw Astral BisonBison meat with a trace of the dimension in it: eat it, and for a few seconds you are no longer quite there.
ItemAstral Guardian CoreThe burning heart of the Astral Colossus, still warm when you lift it out of the boss chest.
ItemRare ScrollA scroll holding the pattern of a rare rune, either Bloodsteel or Stormcaller.