Terraria Community Forums

The fact of the matter is - having a palette swap miniboss isn't entertaining to me. And having a miniboss - you know, at least some credible threat - affect the player for all of five seconds... that doesn't sit well.
There are exactly two threats in the game that really affect progress past the first fight. I'll elaborate on those.

The first is the mechs. The reason? Their souls and bars are used to craft many items beyond the Drax, Optic Staff, Flamethrower, Megashark, etc. Not only are those items made with souls, but later things - the Naughty Present, for example - are made with souls.