Warstaff (Warhammer/staff combo). Call of the Storm is five feet even. It is an archmage’s staff that has been modified into the Warstaff by adding a Warhammer’s hammerhead and infused with magical reserves.
Minor Cultural Modifier: The culture believes, for the soul to leave the body, the corpse' eyes must be open. So any member of that culture takes care any dead body they find has its eyes open. Doubly true for those they kill themselves, for then the corpse will surely rise as an undead hunting him.