To shatter the DragonMark you will need something from each of the four Prime Elementals, but you can't attack them until you weaken their connection to their realm. Go, destroy 5 Earth Elementals and 5 Living Earths. Return here when you are done.
Good, I can already begin to feel Moganth's power slipping.
/join Elementalzone
PRIME ELEMENT II (QUESTS)