I need help finding a mimic

Solution 1:

First, go to the underworld, cling on to the ceiling while scanning for pearlstone; a pink stone resembling ebonstone or crimstone. Then, you must build a platform close to the surface out of full blocks. After that, build a mini arena near the full block platform. Eventually, a mimic will spawn on the full block platform and you should be able to kill it with a repeater and a good stack of hellfire arrows. And then you have a chance of getting the thing you want (which if I had to guess is the Daedulus Stormbow). This is for the hallowed mimic, for the others just do the same with the biomes changed.