just tested in new map with only calamity mod before beat the wall of flesh, no error. After beat the wall of flesh it crash when killing Crimulan Blight Slime.that is the fourth crash related to a "miracleblightdrawer"... which is VERY weird because that debuff isn't supposed to exist at all until the very end of the game!
are y'all using other mods? i wonder if there's a potion id conflict somewhere.
observatorlatam: did you defeat the wall of flesh in multiplayer?