It is a bow that is very effective against undead, having the same enchantments as the Awakened Master Sword, thus functioning more or less as a long-distance version of the Master Sword, as arrows fired from the bow will cause an explosion that would make undead flee from the player, as well as cause sun damage.
Zelda's Bow is found in the Link Between Worlds, floating at the end of a crystal pillar that is connected to the pool below.
Zelda used her bow during many battles in the Last Great War of Hyrule, especially against dangerous undead foes. Its presence in the Link Between Worlds, a remnant of the Temple of Light, implies that Zelda visited the Temple and left her bow behind, either deliberately or by mistake.
Background and Inspiration Edit
Zelda's bow is a heavily retextured Ebony Bow, made to resemble the bow Zelda uses in Twilight Princess, as well as in Super Smash Bros. Brawl and in Super Smash Bros. for Wii U/3DS as part of hers and Shiek's Final Smash.