Farm souls of light in the Hallow, (1/5 drop chance in normal, 2/5 in expert) Once you get 15 of these souls, you can craft a key of light. Place this key in an empty chest and close it and it will summon a Hallowed mimic. Kill the mimic, and hopefully it will drop the Daedelus Stormbow. Keep farming mimics until it drops this. The Stormbow causes arrows to drop out of the sky rather than from the bow, and shoots 3 arrows for every 1 consumed. Pair this bow with Holy Arrows (unicorn horn and pixie dust) and the arrows plus the stars will kill it in no time at all. Also, consider using the ranged titanium helmet for even more damage.
