Material Exchange rotates every week. This means, many of the factions, including Eris Morn, accept different materials each week. Petra Venj always accepts Etheric Light. It is possible that two or more factions accept the same material during a week, and it is also possible that you cannot donate a certain material during a week. This week, the factions accept the following materials: New Monarchy - Spirit Bloom Dead Orbit - Spinmetal Future War Cult - Helium Filaments Eris Morn - Hadium Flakes