Is anyone else having a problem getting the boss "Baneful Queen Mytha" to appear? The lifebar shows up but the boss never does. Tried leaving and coming back, exiting and restarting the game, even verifying the cache and uninstalling/reinstalling. Nothing. Just wondering if this was trainer related and if anyone else had the same problem.
Read the other posts for dark souls 2. If you have easy kills on anywhere near that boss it's likely the boss died before you get to it so it doesn't appear. Make sure you don't use that option and use a Bonfire Ascetic in the bonfire closest to the boss to spawn the boss. It will make enemies harder to kill and will carry on through subsequent playthroughs but at least you'll be able to fight the boss.