Tarn Razorlor is an evil necromancer that dwells in his lair beneath the Abandoned Mine. He is the boss monster in the miniquest called The Lair of Tarn Razorlor, and is guarded by his undead minions, animated steel suits, and Terror dogs.
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When the player first meets him, he is in human form, and then proceeds to change into a mutant form (level 69) and attack the player. Even after the player defeats this form, a ghost form (also level 69) will appear and attack the player. After this form, Tarn will be defeated. After he is defeated, the player will receive 5,000 Slayer experience. In addition to that, the player has the ability to enchant the Salve amulet into the enchanted Salve amulet (e) using Tarn's diary. This amulet raises the wearer's Attack and Strength by 20% while attacking undead monsters.