From what I've read, that's not necessarily true. If you either hit the cow king, or the cow king hits you (or even one of the charged bolts), then it counts. But if the cow king dies without either of those happening, you can still open the portal. I haven't personally tested this, but I did read it somewhere.mhl12 said:also if you or anyone in your party kills the cow king, you cant make another portal in that difficulty anymore
That is true. I have also had a problem where I couldn't create a NM game after finishing Normal, and the same problem might keep you from opening cows. Exiting the realms and going back to the character screen, then taking the character back on the realms solved the problem.Evil Monkey said:Note that you can only open the cow level-portal on a difficulty you've finished, meaning you have to go back from Nightmare to Normal difficulty.