Ok, so take magic from surroundings I can work with. However albeit Aramis may control/forbid draining anything dry but it can be possible and abused by someone else. But there is enough 'free energy' around it will not become issue unless repeatedly tapping into it or gather greater extend. So it may have spell pool sort mechanic and if you refuse pay debt back (or compensate it somehow) it will lead to withering process perhaps. One concept what could work in theme for this is that in first level you gain ability to see 'ley lines' or such; spots where you can gather incarnum.<br/><br/>When using said class feature GM has to tell about such location in visual range and caster needs move stand in spot able gather the energy and use it. After few times of casting spot 'fades' out.