Astral Projection wrote:The spell projects an astral copy of you and all you wear or carry onto the Astral Plane.
Astral Projection is neither specifically a physical copy (the ability to form new bodies WITH your astral copy is a physical thing, but it's also not described as a process of copying and anything that happens to a secondary physical manifestation actually does happen to the astral copy), nor is described as the same process as magic jar, which is described specifically as a body swap and even lists what counts as a body and what doesn't. Polymorph very specifically changes a bunch of things about you, and neither copies nor creates anything.Magic Jar wrote:By casting magic jar, you place your soul in a gem or large crystal (known as the magic jar), leaving your body lifeless. Then you can attempt to take control of a nearby body, forcing its soul into the magic jar. You may move back to the jar (thereby returning the trapped soul to its body) and attempt to possess another body. The spell ends when you send your soul back to your own body, leaving the receptacle empty.
Experience is weird, because it's an incredibly meta concept and you get experience for defeating encounters. The standard for getting XP is already "whatever you can convince your DM you contributed to the overcoming of, for whatever definition of 'contributed' and 'overcoming' your DM will accept."
