On second thought I'd probably just troll the French by moving them to the bottom of flights of stairs after they've walked up.
Honestly. This.
There is so much that I would want to do that requires time to be "flowing" that the only things I could probably get done would be some cleaning, reading, and some rest.
Food doesn't cook without time. Computers and other electronics need time to process inputs. If I want to get anywhere I'm walking.
The only immoral stuff might be some shoplifting, maybe. But even then I wouldn't really be motivated if I could afford whatever it was otherwise.
A changeling might use a different name for each mask and persona and adopt new names as easily as they change faces. The true name of a changeling tends to be simple and monosyllabic; however, there are often accents to a changeling's name that are expressed through shapeshifting, something single-skins will likely miss. So, two changelings might have the name Jin, but one is Jin-with-vivid-blue-eyes and one is Jin-with-golden-nails.
I'm more concerned about why your changeling father is trying to conceal the fact that he is your father from you. It's not like changelings pick a shape and then stick to it forever. He could literally just flick his blue eyes or golden nails or whatever and you would know that it's your dad.
Edit: Wait is this a meta meme about some dude banging his dad?
I personally only give NPC casters spells that fit them thematically or have in game reasons for having that spell. If counterspell is one of those, then I will use it to the full extent that an accurate portrayal of that NPC allows.
In your situation, if you are having the players roll to recognize spells, an easy solution, albeit one that slows things slightly, is having the NPC do this as well. I personally don't bother with using a reaction to recognize the spell I just call for the check if they ask (within reason of course). The roll can be made behind the screen, but it should help things feel more fair for the players. I know most tables will use an arcana check with a DC of 10+spell level. Some tables will just have the caster roll against their intelligence score. Roll it however you feel is appropriate.
Body Press
Oh my
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Bésame
No need to reinvent the wheel for a lot of this stuff. Check out the Eberron setting and a ton of the stuff that Keith Baker puts out about "The Last War". The central and defining aspect of the Eberron setting is that it is generally played in the reconstruction period of a century long magical world war and goes into great detail about different countries motives and means to fight in said war and how it changed over time.
People forget that California all by itself is larger, more populated, and has a wider variety of biomes than many countries.
As the ~~crow~~ horsey flies
This is funny, I see your point but would rule the opposite. Because the bag wouldn't be able to close due to a neck being in the way it wouldn't seal the pocket dimension and I would rule the guard would still be able to breath (and scream) through the bag.