You were an angel, you were sent down to watch the earth.

There were some perks though, like you can fly, never die, anything dead you touch comes to life, but there was one power, you had to say angel 4 times and your guardian angel would come save you in some cases. basically magical girl stuff.

but some humans thought you were evil, so you were at the stake, tied to it while they threatened to kill you.

"i knew there was evil upon us, kill her!"