Runes of mostly dead

Ritual (1 Watch). Single Corpse or mostly dead target. Touch. Attunement. You cover a body in runes mixed with your own blood. Once finished you are attuned to the target corpse or future corpse and it becomes ambulatory and follows your single word instructions. This preserves the body and if otherwise undisturbed prevents further decay or degradation allowing to potentially recover from being mostly dead or restore the dead to life. This prevents the corpse from becoming undead. Movement is half normal max and otherwise functions as though the mostly dead target is in a coma. If you blow the MAG roll for the incantation you can force the issue to make it work but take life damage equal to the difference otherwise the incantation fails and the target remains as it was and cannot be the subject of this incantation again.