a magic mirror? (like the one in the narnia movies)

half poem/half riddle written by me;;

with silent feet i creep across water's head
at dawn, at dusk, i obscure the light
my body solid yet one can still pass through me
like an eerie storm, i roll on the wind
consuming all in my wake
and only in time shall i dissipate
what am i?

Fog?

A dad and his son were riding their bikes and crashed. Two ambulances came and took them to different hospitals. The mans son was in the operating room and the doctor said, I cant operate on you. Youre my son.

(Idk. A bit tricky but yeah...)

The doctor is his mother

Five pirates are parting ways after finding a treasure of 100 pieces of gold. The pirates decide to split it based on a vote. Each pirate, from oldest to youngest, gets to propose a plan on how to split the gold.

If at least 50 percent of the other remaining pirates agree on the plan, that is how they will split the gold. If less than 50 percent of the pirates agree, the pirate who came up with the plan will be thrown overboard. Each pirate is smart, greedy, and wants to throw as many others overboard as possible without reducing the amount of gold they get.

What plan can the first (oldest) pirate propose to live and get as much gold as possible?

hint, it's easiest to figure out each plan from youngest to oldest, also it can help to draw it out

Technically it was the Mirror of Erised, but yes, a magic mirror.