Item pages show everything about an item, including where later ones are found.

Thundering Berserkir Axes

Tools

Carnage spreads around you when you wield these axes, such that Thor himself would be proud.

20armour
140slash damage
80chop damage
10lightning damage
2weight

How to make it

At the Black Forge (level 4):

Everything it takes

From scratch, counting what you have to smelt, cook or craft first, this is what you gather:

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Upgrades

QualityBlack Forge levelCost
255 Flametal, 1 Iolite
3610 Flametal, 2 Iolite
4720 Flametal, 4 Iolite

Past quality 4, the Forge of Potential can upgrade it further using a Flametal Battle Idol. Idols are found in chests, and a failed attempt can destroy the item.