In battle, Volstagg's weapon of choice was usually an Asgardian battleaxe. Being a man of brute strength, Volstagg preferred weapons of force rather than agility in contrast with his companions.
Volstagg armed himself with his axe as Hela invaded Asgard through the Bifrost Bridge, being the first line of defense along with Fandral. However, he was unable to use the axe in any meaningful capacity, as he was crippled and killed nearly instantly. Brandrheid Undrsigr, along with Volstagg's body, was presumably left in Himinbjorg and destroyed by Surtur along with the rest of Asgard after the Battle of the Rainbow Bridge.