Marsh's obsidian axe

Marsh's obsidian axe emerges as a signature weapon in the Mistborn series, wielded by the Inquisitor Marsh during pivotal confrontations in The Hero of Ages. Though absent from earlier books, it symbolizes his transformation into a brutal enforcer of Ruin's will, crafted from the sharp, Allomantically potent obsidian ideal for piercing steelpushes. Its role underscores Marsh's tragic arc, blending his retained humanity with Inquisitor ferocity in the series' climactic battles.