The lamp and torch puzzle is part of the Lost Runes quest in Zoltun Kull’s Library in Diablo Immortal. On this page you will learn how to solve this puzzle by placing the mirrors correctly.
In this puzzle, you must arrange the mirrors so that the beam reflected from them hits the levitating rune at the end of the room. Completing this puzzle is required to continue the main storyline.
Note that there are “rails” under the mirrors, so you know where the mirror can go without even interacting with it. They can only be moved, not rotated. To solve the puzzle, you must place the mirrors as shown in the picture above.