I really like the flavor and ideas in here, and will def try and test it if I get the chance. One thing I did notice on my first read-through, and apologies if this is too nitpicky, but the wording of Soundless Crash is confusing.

I think it's calling for the target to make an opposed attack roll, but it only actually says "opposed attack" in the Essence effect. It also references the opponents "check", which I think is supposed to be said attack roll?

Also, the Essence effect says they get a bonus on the opposed attack roll, but unless I'm totally misunderstanding, the target is the one making the opposed roll.

Apologies for any formatting weirdness, I'm writing this on mobile.