Mystic Shadows OS

Mystic Shadows OS, since it is truer than Star Dream Soul OS, is the truest and most complex form of Star Dream. It is harshly named Star Dream 2.0 when it fights in its first two phases. It also, during its third one, fights in 5 distinct phases:
Phase 1
When phase 3 of Star Dream 2.0 happens, it backs away for a second when a ray of light shines on it, and it turns into Mystic Shadows OS in this phase. Instead of doing what normal Star Dream's third phase does, it does many attacks with itself only. When the phase is done, it then gets you in a hole on his head.
Phase 2
When you are inside of its core, a huge orb fights in this phase. It, when the phase is done, tosses you out of the face for phase 3.
Phase 3 
You fight this phase back in a different phase of the previous form. It gets you back after it.
Phase 4
The orb, in a form with 4 legs, fights in this phase. It gets you out defeatedly after it.
Phase 5
In this phase, it returns to its face with no core and outer shell and fights on the other side of the place where it fights phases 1 and 3.
Final Shot
Mystic Shadows OS, defeated alas, rests in the shadow for a second, then turns into bright light, until it is normal and shoots out a huge round shadow rifle, and you have to turn into a huge round shadow rifle, too. You shoot mini rifles at the final boss's mini light discs, then shoot rifles around you at its sheilds. Then, you turn to a huge pin and touch its hole, and you smash it on all sides. Then, you turn into a huge disc and give the final boss, itself, a ginourmous hit, which it explodes to thousands of shiny rays.