A feat dangle is a long thin strand of worked Fuserock in which the memories of how to do 1 specific feat are stored. They can be attached to the Fuserock Headdress, which starts with one attachment point but grows more as you use more Class Charms. The headdresses have also been known to grow more when the maximum amount of class charms have been used. You can remove feat dangles and trade them into the Hunters Guild when acquiring new ones. Only the wearer can remove a feat dangle from their headdress. As you become more powerful, you will be able to access more of the memories from each dangle.