Ranger Reg, the Power creation rules will be in the Masterminds Manual. My problem is however is that not only weren't they included in the Core, that the powers themselves are all built so variably. Some powers, different ranks do different things (Insubstantial, Super senses, Super movement, etc), others they increase the effect, others are pay x amount to get 5pp a rank to spend for variable things. This variability resists the ability to create powers if you don't have the design rules that Kenson used since its almost like there are a few systems jumbled together.