How do you start a New Game Plus in Infinity Blade? I see it mentioned on walkthroughs, but no one ever details how to achieve it. Moreover, it seems to be a necessary prerequisite to mastering items more than once.
I've never seen it come up as an option, either in the game itself or through the Options menu. FWIW, I'm at level 40, and I've defeated the God King three times.
Thanks for any help!