Sword of the Hero
"A sword once wielded by a hero in an ancient age. When it’s grasped, a strange sense of nostalgia washes over you. Take it when going alone would otherwise be dangerous."
The Sword of the Hero is a melee weapon found in Tears of the Kingdom. One of the handful of special of legacy Zelda weapons that can be both found in-game and through scanning amiibo, its design is modelled after the Sword from promotional artwork for the original 1986 The Legend of Zelda.
Tears of the Kingdom
The Sword of the Hero is one of many unique weapons and armor pieces that can be found in the Depths below Hyrule, in this case in the hollowed tree stump that can be found in Dalite Grove, directly parallel to Dalite Forest on the surface. It can subsequently be purchased from any Bargainer Statue in the Depths. Another way to obtain it is to scan the 8-bit Link amiibo.