Recruit's Sword

The Recruit's Sword is a sword from Spirit Tracks, which resembles the Hero's Sword and Oshus' Sword from the games' predecessors. This dangerous yet unremarkable weapon is obtained in the training room of Hyrule Castle, as Link requires a sword in order to traverse the hidden back way into the Tower of Spirits, which is full of enemies. The leader of Hyrule Castle's guards gives it to Link, whom he mistakes for one of his recruits due to his Recruit Uniform, after Link successfully completes a basic sword training exercise. It is eventually replaced by the Lokomo Sword.

While using the Recruit's Sword, Link must collect three Tears of Light in the Tower of Spirits to be able to strike a Phantom in the back. This will stun the creature and will allow Princess Zelda's spirit to control it while in that state. After Link obtains the Lokomo Sword, he no longer needs to use the Tears of Light -- the sword itself is infused with enough energy that allows Princess Zelda to control the Phantoms in the same way as she did when Link possessed the Recruit's Sword.