Alchemical Ninpō

As Naruto is recovering from beating Pain, something Hiruko left behind so he'd be able to see an old associate who helped him after he'd left Konoha triggered, causing Naruto and a certain kumo Kunoichi arriving in a reality where Chimeras are actually common. Now they need to find a way home, but is the only path back by using a stone that glows with the power of stolen lives?