It is given to Eir along with the Eir's spear to claim bonus experience in either Prayer or Divination and to unlock the valkyrie spear cosmetic override. Returning the helmet and spear to Eir grants either 49,500 experience and 148,500 bonus experience in Prayer, or 43,560 experience and 130,680 bonus experience in Divination at level 99 in their respective skills. It is dropped by the three winter wolves, Hati, Sköll and Fenrir, or obtained from harvesting an enriched sparkling wisp. It can be traded with other players, but only in exchange for another helmet or spear.