Created by a man who lived in Kakariko Village back when it was a Sheikah-only village, the Lens of Truth was retrieved from draining the well and killing the Dead Hand within. This magical artifact slowly drains Link's magical energy as it is used, but allows him to see things as they really are while he has it activated. Illusions and tricks are rendered useless while this artifact is on. Thanks, creepy Sheikah man!