Your are Bound to Your Vessel, you May not move more than 100ft from your vessel at any given time. While your Physical Body is Manifested your are able handle and Carry your Vessel Freely. Your Vessel holds the very essence of your Spirit, it has an independent HP from your Manifested Body. Upon your Vessels Destruction, your Spirit will be ejected from the Vessel at its current HP, and Take 2D6 of Damage per Turn unless a Suitable Replacement is quickly Found.

Your Vessels HP is calculated of your Max HP with Additional Plus 2 HP per level, or your CON Modifier. Whichever is Greater.
Your Vessel will heal half of its Max HP per long rest.

Spirit Body: You May Manifest your spirit outside your vessel as a physical Body. To Exit the Vessel you must Maintain Concentration for several seconds until your body is fully Manifested, any attack during this period will roll with advantage and if successful will cancel the process. The Same Rules apply to Entering your Vessel.
This body is significantly more fragile than most Mortals bodies, Only counting half of your max HP towards your Manifested Body. Upon suffering critical damage, if you fail your death throws, you will be forced back int your Vessel unable to return until your next long rest.

Inner Space: The space inside your vessel can be used as a pocket storage only accessible by you, However it can only hold up to half of your Current carry weight at any one time, any attempt to store over this limit, will result in all the items inside being ejected from the space and falling into the surrounding area.

Spirit Binding: Upon Reaching Level 5, Gain the Ability to chose one Creature to Permanently Bond with. When they equip or hold your vessel, You Gain a telepathic link with them within 100ft and the ability to cast guidance on their rolls. if they are no longer holding your vessel both of these effects end immediately. 

Darkvision: You can see in dim light within 60 feet of you as if it were bright light and in darkness as if it were dim light. You discern colors in that darkness only as shades of gray.

Incorporeal Nature: Due to your Bodies fundamentally Incorporeal Nature, you do not need to breath and are immune to suffocation. Your also Body also naturally levitates up to a 1ft off of any solid surface. You also possess innate knowledge of the Acid Splash cantrip for basic self defense.