Astral Projection

You and up to eight willing creatures within range of the spell project your astral bodies into the Spiritual Realm (the spell fails and the casting is wasted if you’re already on this plane). The material body you leave behind is left in an unconscious, suspended-animation state; it doesn’t need food or air and doesn’t age.

Your astral form resembles your mortal form in almost every way, replicating your game statistics and possessions. The main difference is the addition of a silver cord that extends from your shoulder blades and trails behind you, fading to invisibility after 1 foot. This cord is your connection to your material body. As long as the cord remains intact, you can find your way back home. If the cord is severed - something that can only happen when an effect specifically states it does so - your soul and body are separated, killing you instantly.

Your astral form can travel freely through the Spiritual Realm and can pass through existing portals there that lead to any other plane. If you enter a new plane or return to the plane you were on when you cast this spell, your body and possessions are transported along the silver cord, allowing you to re-enter your body as soon as you enter the new plane. Your astral form is a separate incarnation. Any damage or other effects that apply to it have no effect on your physical body, nor do they persist when you return to it.

The spell ends for you and your companions when you use your action to dispel it. When the spell ends, the affected creature returns to its physical body and awakens.

The spell can also end early for you or one of your companions. A dispel magic spell cast successfully against an astral or physical body ends the spell for that creature. If a creature’s original body or its astral form drops to 0 hit points, the spell ends for that creature. If the spell ends and the silver cord is intact, it pulls the creature’s astral form back into its body, ending its state of suspended animation.

If you return to your body prematurely, your companions remain in their astral forms and must find their own way back to their bodies, usually by dropping to 0 hit points.