The Axe

The Axe is a Hamaxe (Abilities of an Axe and a Hammer) dropped rarely by the Jungle hardmode Boss Plantera. With 175% axe power and 100% hammer power, it is the most powerful axe and hammer in the game (in terms of mining power).

Referencing its appearance, it makes electric guitar sounds every few hits.

This could possibly be a reference to Marceline the Vampire Queen's Axe-Bass from Adventure Time.