You rp out a 1600 word post of you training and mastering your Cero. Make it believable, not a bunch of random stuff, that has no bearing on Cero training. I want a detailed, good training post, with no lack of creativity. If it is horribly crappy, then expect a big old disapproval stamp from me. The Vizard who has the nobility that allows them to create custom Cero, will also have to train their Cero. No exceptions. Yes, a 1600 words for each and every Cero.