Chronozon

Chronozon is a demon that must be defeated in Family Crest. It must be hit with all four elemental blast spells in order to be killed. It will not drop the crest part unless you have completed most of the quest. It should also be noted for being the only demon that drops bones, instead of the usual ashes. (UPDATE: Chronozon now drops ashes like other demons upon death)

Chronozon is located in Edgeville Dungeon, in level 2-3 Wilderness, right by the Earth Obelisk.