SFSAuthorkun

Slim Shady

There are two situations where the stone village lost tens of thousands of people, against the 4 hokage because Minato and against the Third raikage that fought for 3 days and nights against the stone army but these did not happens yet, so stone probably has enough was killed manpower to fight on 3 different frontlines. So stone and sand can fight together against all big villages and spare in this timeline.

boar'

The transform body into metal basically transform in into a super powerfull cyborg with missiles and lasers

flaapy bird in its peak made about 350k-500k per DAY, when the game closed it was making about 50k per day.

The Technique was not fully explained, but since they used the clones as training partnes, and the clones did not vanish easily like shadow clones, and the clones physical damage also returned to the fighters, i wqould asume that if the clones died, they would not receive their ki back, at least not fully.

I think chase should lean in the supernatural explanation to House, simple because House had an aversion of the supernatural, he hated not being able to explain things scientifically, so much that he almost died more than once to prove the supernatural did not exist. So if House wants a explanation just say that you died in another life that House Md was a tv show and you have seen the furute, and you have powers, it will be the trith but House will deny out of principle.