Are we allowed to create a subset abilities that come from the "one" ability? Or is it strictly ONE ability?
Sorry for before... Usually I prefer one ability. Not sure about your concept, but having only one ability icon to click is probably naturally, and I can explicitly add, or remove, the
one ability for example. But if it's needed to complete your dreams, and is really just a sub ability, then it might be okay, too. But I should state what exactly is okay. Therefore, in your case, is it a sub ability, that always exists parallelly, and regulates the main ability in a way, or how can we imagine?
Maybe the definition from Zephyr #15 is enough?
You may, but don't have to create a second help-ability next to the main spell if it's required for your concept. -- but in case a second ability is used, it's extend should be kept at a minimum.