Astral Fight

[Amaterasu]

Spiritual Attunement (Unlock) – 500 OM
With enough training, you may consciously enter the Astral Realm. Doing so requires you to enter a meditative state. Your body remains where you left it. Unlike while dreaming, entering the Astral Realm consciously poses dangers and all damage suffered to your spiritual body happens to your real body.

Spiritual Enlightenment (Unlockable) – 2000 OM (1500 OM if replacing Spiritual Attunement)
With a great deal of training, you may learn to physically enter the Spirit Realm. Entering or exiting the Astral Realm physically requires a good five minutes of uninterrupted focus. However, it is a great advantage to be able to do so. When ready, you may exit the Astral Realm to anywhere within a short distance of where you entered.

I think the text may have been changed, but I believe that Attunment means you can only stay for so long because your physical body isn't getting fed/hydrated (so it's sorta like plugging yourself into the Matrix) whereas Enlightenment is a straight upgrade in that it lets you physically enter the Astral Realm, thus eating/drinking/sleeping there works too and you're not leaving a vulnerable body behind.
That's just me though, you'll need to ask in the Help Desk for a "real" answer :frog: