Originally posted by Scytha:

Given how hidden everything is already, it is killing our spirit to want to play and try the new boss.

If you can't deal with the mist, you're gonna have a bad time at the boss anyway.

The difference between "unlocking" mistlands boss and other is that the items that you use to "unlock" other bosses are also their summoning-sacrifice items, but that isn't the case in mistlands. But players have always been reporting these kinda issues with Moder or Yagluth too. It's nothing new or unexpected really, just progression that is continuing through each biome.

Recommend everyone to actually complete the biome, preferably on multiple worlds, before drawing final conclusions.