Some people seem to forget that somebody with that much power can't give a flying fuck about contracts. If he wanted to get inside and even take the corpse he could have done it. The corpse or the rune is not even a bargaining chip, it is just an offering you do to a god to see if he gives it's...
This is beyond fucked up. One can't possibly imagine the repercussions of letting pedo church to merge with pedo Japan in the early stages of its creation.