be cut off, break, snap, burst, collapse / be cut, be injured, become fissured / break off, be interrupted / cut or sever connection with / run out, expire, terminate

be able to do, be able to finish

Same as above.

cannot completely... (because it's excessive)

ball lightning

palace

electricity outage, blackout

for electrical power to be temporarily cut off

misreading of 云々 (unnun, “and so on”)

(idiomatic) A piece of cake; an extremely simple thing, something trivial, a cinch, easy as pie.