Everyday night 7 to 8pm will open enhance material event, can randomly get enhance material card, the event that has been clearance can repeat again.
Monday : Core hound E(Drop Earth Attribute enhance material)
Tuesday : Core hound W(Drop Water Attribute enhance material)
Wednesday : Core hound T(Drop Thunder Attribute enhance material)
Thursday : Core hound A(Drop Air Attribute enhance material)
Friday : Core hound F(Drop Fire Attribute enhance material)