I’d argue you need correspondence to cast it to a place you can’t see, but that’s just how I run it, every table is different.
RPGMemes
Humor, jokes, memes about TTRPGs
Having run both MTAs and MTAw, I prefer not having so many spheres to achieve a relatively simple goal. Like in this case, you are looking to use three spheres at reasonably high ratings to just remove a guard. In MTAw you could use any one Arcana at 3 or 4 to accomplish the same task.
Time 4: The guard is transported a day into the future.
Forces 2: Render your group invisible and soundless.
Life 4: The guard is turned into a rat or whatever.
Mind 2: The guard forgets the group was there, or any higher rank to just mind control the guard in various ways (MTAs can also do this with the single sphere)
Prime 4: The guard is forced to look into the Supernal and his eyes are burned out in the process. Dick move.
Space 4: The guard is teleported away.
Spirit 4: Chuck the guard across the gauntlet.
And if you just want to kill or incapacitate the guard any single Arcana can do that at 3 (bashing) or 4 (lethal) all by itself.
Had a similar argument someone wanting to use heat metal to make and impromptu fireball using metal powder, I don't think any one agreed with the guy that it wasn't pushing things a bit too hard
this makes me want to see an elecromancer and aeromancer carrying around bags of flour and sawdust to fucking annihilate entire buildings with a single spark, while everyone thinks it's some grand pyromancer summoning hellfire
Better yet they wouldn't even need to be madic users
on one hand it could be accidental where everyone is looking for any kind of magic even artificers but it's just very bad luck that magically ground flour is a new craze so the docks and warehouses that keep exploding haven't been storing the flour right, there's enough left over magic in the flour to make it disperse in the air sometimes then some old fashioned places are still using lanterns for light, police and gangs alike are on a man hunt
or you could have a pretty basic setup of a fine finely ground powder inside of an empty egg with some kind of rune that let's out a small fireball when destroyed painted on the side, everyone thinks this low lever magic user is some grand wizard for transmogrifying eggs into explosions, on top of that I wonder if thermite can be set off in a powder explosion kind of way