User blog comment:CaptainLocoMoco/Please help me figure out how to kill the destroyer!/@comment-4675151-20111213204623

Destroyer cannot leave the ground above 50 blocks, Wyvern spawns at 60 blocks(randomly lower but very rare)

If you do the math that should tell you the window you have to build an arena(solid blocks around top/sides wooden platform across bottom). Ensure you leave yourself some room to move(40-50 blocks wide) and then put on your best gear. Grab a big gun and camp the destroyer out while soaking no damage from him. If I go through 2 HP pots a fight it is because I am trolling around on the ground while fighting him.