Celestial Pyre

This spell can only be cast at night. You touch a lifeless corpse within range and begin burning it and the firewood with radiant flames. The body will then slowly dissolve into stardust and transform into a constellation of your own design right above the place where you performed the ritual. When a body has been transformed like this, it is considered immune to decay or becoming undead. As such, spells like Revivify and Resurrection can be used to target the constellation instead of a body, bringing the creature back to life as normally stated by the spell while the constellation fades. 

The constellation created by the spell is only visible to you and any number of creatures that you choose.