The Duke's Decapitator is a Hardmode non-consumable rogue weapon that drops from Duke Fishron. It automatically throws a fast spinning axe that slowly decelerates to a stop and shatters shortly after. The axe will latch and hit an enemy several times before disappearing. While latched onto an enemy, the frequency of hits correspond to the speed of the spin, as the spinning decreases the longer the axe linger.
If the player has full rogue stealth, the next axe thrown will create floating bubbles as it travels. The amount of bubbles slowly increases until the axe itself breaks.
Its best modifier is Unreal.