So in the end this will work more or less like an empathic bond for permanents, but with a delay until it gets to its full potential, with no stacking and immaterial from a practical point of view (destroying Yggdrasil after a while becomes useless).
We also need to weight in that because of quanta generators, you'll tipically have more perms than creatures.
I'd say that the disadvantage of having a max of 1hp/perm and the fact that there is no current way of spamming permanents make up for the advantages, so this should cost the same as empathic bond: 5|4