Board Thread:Game Help/@comment-32181680-20180605185701

I'm playing on my world, got my first solar eclipse after beating the twins and skeletron prime (I beat the destroyer before and had some solar eclipses after that), but the only new enemies I'm encountering are reapers and mothron (so far I have not seen and nailheads, dr man flys, deadly spheres, butchers or psychos), is there anything else I need to do to find any 