What do you guys think the drawback to Shin's new ability will be ?

spoilers

Like nagumo said, a power thats very convenient will have its weaknesses. I think shin will have either an aneurysm or some sort of severe brain damage that will exclude him from the next arc in order for him to get some treatment. Hopefully it can also be a way for Lu to comeback to stand in for shon as he recovers. Whats your opinions though??