The Star Brand is a device that shouldn't exist. It essentially created itself, coming into being after the sum of space-time was compacted into a singular point for the smallest instants of time; in other words, the Star Brand itself is a paradox. Essentially a Zero Point Energy collector, the Star Brand draws forth power from the fabric of space itself for its wielder.

And it can draw forth a whole lot of power. Any individual wielding the Star Brand can utilize intensity 15 cosmic energy manipulation, allowing him to do virtually anything he desires. This is the standard level that power effects will manifest at, though the Brand's wielder can boost this significantly, if he so chooses, to a standard limit of intensity 25.

While this requires no special action or other game mechanic, it is not without difficulty or risk. You see, using power of this magnitude is rather foolish for a mere mortal to attempt, as there are all kinds of unforeseen effects that can be caused by such displays of raw energy. Remember: intensity 25 and above is typically what one could call world shaking levels of power.

However, even this level of energy isn't the ultimate limit of the Star Brand's power. You see, the Brand's wielder, if he knows he can do more, can exceed the intensity 25 'limitation', possibly boosting his power as high as intensity 30. For example, Ken Connell could do just that with his flight and space flight powers, moving at nigh-infinite speeds through the cosmos.

Now, as was stated above, the Star Brand grants its user the cosmic energy manipulation power. This is essentially the ability to use any power, at once, as the user sees fit; as you can see, this is even more versatile than the selection power, as the Star Brand's wielder can perform a different power effect each exchange - in fact, he can utilize more than one at the same time!

The wielder of the Star Brand can do this by passing an intellect action based on the number of power effects he'd like to utilize at once. Operating two powers at once is an average difficulty intellect action, with each additional power effect desired increasing the difficulty by one difficulty level. So, the wielder of the Star Brand is only limited by his own intelligence.

And his imagination. For instance, before he went insane, Ken Connell could only wield the Star Brand in such a way that allowed him to fly, be invulnerable, and wield energy emission powers. Jacob Burnsley, on the other hand, could also manufacture micro-environments and heal injuries, and Quasar even used the thing to teleport himself into the Quantum Zone!

Now, another interesting thing about the Star Brand is that while it is easily transferable to another person, it never totally goes away from its wielders. Once transferred to another person (done by touching the Star Brand to said person and activating the transfer), ninety percent of the Star Brand's power will move to the new wielder, but ten percent of it will remain in the original host.

Since the Star Brand's potential is effectively infinite, this has no effect on the specific intensities and limits described above, for either person. As such, it is conceivable that the Star Brand could eventually perpetuate itself throughout the human race, were it to be given out carelessly, though the world would likely be totally annihilated by the irresponsible use of its power long before that.

Another thing to keep in mind about the Star Brand is that it must have a sentience guiding it at all times; this is why it created Ken Connell in the first place. Transferring the Star Brand into an inanimate object will cause its power to burst forth violently, disintegrating everything within miles and generating a pulse of paradoxical energy potent enough to cause mutations in human beings.

In other words, don't do that. It would be bad, and bad for you. Doing this was what caused the White Event and the Pitt devastation in the first place, two global events that caused the creation of paranormal beings across the earth. And, as one can guess, the consequences of these events were what caused the New Universe's earth to go totally downhill from that point.

Finally, the Star Brand itself acts as a divinity machine, in that it grants two powers to its wielders that operate outside of the Star Brand itself. The first is immortality. Once a body accepts the Star Brand's power, he becomes an immortal being; he can be killed, even atomized, but he will eventually return to life. The only thing that can possibly end the wielder's life is old age.

And even this isn't quite a limitation, as the Star Brand also grants its wielders +5 resistance to aging and aging attacks, adding approximately one thousand years to their life spans.

By this point, you can easily see that the Star Brand is a dangerously potent artifact, and that it should be utilized with the greatest of care. Anybody not doing so is inviting disaster to their world and their campaign. As such, I recommend that the Star Brand appear only in the hands of NPCs or incredibly mature players. However, it's your world, so do what you think is best...