I have enter Duriels chamber with and without mercs. No matter how hard I press the button or how many times I press the button, my spells will not cast. This happens whether I am affected by his cold and even when I am not.
workaround is try to drop a town portal it wont cast the town portal but you will be able to use abilities again.
So this is a known issue then. I couldn’t find it anywhere.
So many issues id be surprised if you could find a specific one lol.
Stuff from original game…and some ppl also learning as they play beta.
Remember its not a remake