Ariadne's string

Ariadne's string is a low level item that can either be crafted or found in the Minotaur's boss loot. The item, when right clicked on the ground, will place a string block which glows in the dark. This makes it a useful tool to bring in mines in order to avoid getting lost. The string item has 1500 charges.

Mythological background
Ariadne was the daughter of Minos, king of Crete. After winning a war against Athens, the king, every year, would force the Athenians to send him 7 young girls and boys so he could feed them to the Minotaur in his labyrinth. At some point, the hero Theseus volunteered to go, wanting to kill the Minotaur himself. Ariadne, falling in love with Theseus, secretly gave him some string so he wouldn't get lost in the Labyrinth.