Doom Axe

The Doom Axe, also known as Demon Axe is a recurring weapon in the Mana series.

Final Fantasy Adventure / Adventures of Mana
The Demon AxeAoM/ ZeusFFA (jap:まじんのオノ) can be found in a treasure chest in the Undersea Volcano. Like other axes, it can be used to chop down trees and thorns in the fields and dungeons.

Secret of Mana
The Doom Axe can be forged by gaining the Axe's Orb from a treasure chest by slaying fiend heads in the Mana Fortress.