This is one of the Mistlands changes that I really dislike so far. I'm on a replay from zero on a fresh Mistlands seed and now, right before the Bonemass challenge, I've noticed, that it's impossible now to make a Frostner or Iron Sledge because Ymir flesh isn't available like before. Frostner was imo the best weapon to kill Bonemass and it's a pretty poor decision to punish a player who found silver without the Wishbone by removing a crucial ingredient. :(