False User (monster)

False Users are summoned by the Echo of Jas during the fight with her in One of a Kind. They take the forms of Lucien, Saradomin and Zamorak, and after a few seconds, use a special attack. Lucien will shoot an unavoidable, powerful attack that deals roughly 2000 damage, Saradomin will heal the Echo of Jas, and Zamorak will drop rocks on your current location, which deals moderate damage over time. To prevent these attacks, they must be killed, and due to having only one life point, they can be defeated with little difficulty.

Trivia

 * Despite only having used the Stone in the Third Age, Saradomin appears in his Sixth Age attire. The same goes to Lucien who has last been seen using the stone in his rejuvenated form.