And the character, obviously unaware of this, inevitably tries to use their powers and gets your body killed… Preventing you from ever switching back. As this can happen repeatedly, you are doomed to multiverse jumping to random people’s lives until your death… Leaving a trail of ruined out of place lives behind you.

Nah… Just take the current definition of planet and append “and also Pluto because we’re emotionally attached to it” and you’re good.