User blog comment:CaptainLocoMoco/Please help me figure out how to kill the destroyer!/@comment-12.174.24.105-20111210005659

You can easily kill the Destroyer with Mithril armor (melee headpiece for the extra defense), a Cobalt Shield (or grappling hook to anchor yourself to the ground), a Cross Necklace (found from Mimics), a Mana Flower, and a Magical Harp, with 10-15 Greater Mana Potions in your inventory. Simply summon the Destroyer and stay inside its body as it passes through you, firing Magical Harp along its body. Don't move for whatever reason - the Probes will gather around you and be killed by the Magical Harp, dropping hearts directly onto you. Nothing should damage you except the Destroyer's body, which does relatively little damage, and you should only need to use one Health Potion, if any, if done properly.