Okay wow, turnout way over expectations. Submissions have been pruned to an acceptable number with the help of randomness; the rest of you can be on a waitlist, though, and perhaps you'll get a chance to affect things along the way even from there.
Chapter I
Initially there was nothing. This was generally considered a perfectly acceptable state of affairs by everyone present at the time (viz: nobody), but, as has oft been said, nothing ever changes; so like it or not, change it did.
The first moments of that change were little more than a blur to your forming awarenesses, a swirling rush of energy expanding in every nascent direction. It is as hot as heat and as dark as the centre of the sun, and there is nothing here. Not so fresh and innocent a nothing as the nothing before, though; this is a nothing that's seen some misuse, a nothing showing some wear. As has so often been said, nothing ever changes, and this nothing is ready and eager. That is where you come in.
The first to arise is a thin curl of green smoke winding through the metaphorical plane, serpentine and insidious, the Ace of Pains dreaming of new depths of agony; its reverie is soon interrupted by the charging-in of a fractal flurry of ice-sharp spikes as the Ace of Gains begins to plan horizons to ascend. Their squabbling attracts the attention of the Ace of Valours in the form of a cluster of shimmering lights, closely tailed by a flat orange haze which stares mute and mindless; a shifting panoply of bubbles and a cracked mountain of black glass come into being at almost the same time, while an oddly dripping woolly silver-grey tuft watches suspiciously next to a stack of perfectly identical cubes, and a dense cloud of gently circling maroon specks trails far behind the others. Finally, almost apologetically, a purring spray of light blasts out of nowhere and even sounds the first word in the universe as it names itself Felidae, the Ace of Cats.
The group of budding concepts grow cognizant of one another, while the flood of creative energy washes through them and they feel their power waxing. Each force wields that power through ten increasingly powerful layers, ten concentric sefirot represented by the Knave through Ten of a force's metaphorical suit. For a more personal touch, each force also reserves four powerful face cards, the Page, Knight, Queen, and King, but it's likely that those will not see use for a while yet. Because right now there is nothing, and it will be necessary to change that. To that end, you will have to begin shaping the energy of your home as it cools, a process that will demand you spend your newfound power; and on top of that, forces are always vying on the metaphorical as well as the physical level, and you may wish to act to secure your own advancement even now.
Each force in the universe may spend one or more of its units of power, from 1 to 10, to enact a law of physics with each. Luckily for all of you, no doubt, the universe runs on metaphor and so these laws don't need to be strict mathematical formulae, but simply descriptions. As long as you don't try to break out of your bubble (this would kill you all), the possibilities are pretty vast; you could design anything from a Viking world tree cosmology to a set of elemental planes or a celestial bureaucracy or even, in principle, a perfectly ordinary Earth. Remember, though, that these units of power are not interchangeable, but increasing in value, and the value of power spent on an action will affect the result, especially in the case of conflict.
Alongside that, or instead for any who decline, forces may choose to spend one unit of power at any level as a bid for Ascendancy over the others; the winner of this bid, if any, will enjoy increased power in the next cycle.
Please begin.