Bronze Horn of Valhalla is a very rare wondrous items in D&D 5e. It does not require attunement.
Wondrous item, very rare
You can use an action to blow this horn. In response, 4d4 + 4 warrior spirits from the Valhalla appear within 60 feet of you. They use the statistics of a berserker. They return to Valhalla after 1 hour or when they drop to 0 hit points. Once you use the horn, it can't be used again until 7 days have passed.
If you blow the horn without having proficiency with all medium armor, the summoned berserkers attack you. If you meet the requirement, they are friendly to you and your companions and follow your commands.
Frequently Asked Questions
You can use an action to blow this horn.
The Bronze Horn of Valhalla is a Very Rare magic item in D&D 5th Edition.
The Bronze Horn of Valhalla is a Wondrous Items — Wondrous item, very rare.
No, the Bronze Horn of Valhalla does not require attunement and can be used immediately when held or worn.