Amol Selseira is Morgiana's Household Vessel.
Morgiana first wears these on her legs, but she did not know what to do with her long chains. Then, she wears it on her wrists. Upon activation during the Zagan arc, she uses the chains to hook to the walls, so she can rescue her friends from being eaten by a beast at the bottom of the trapdoor. She has Amon's flames which allows her to burn things.
The flaw with her Household Vessel is that she does not have enough Magoi to use it without suffering from Magoi depletion.