Nah, it's got that Elden Ring Nightreign health scaling. He's got an F scaling in vigor but it still doubles the HP from 1 to 2, and an A scaling in mind. Totally makes sense. Just as much sense as 'dominate all things' being a super weak trash skill.
As much as I dig the concept, won't the shirt eventually get wet enough that the rain will seep through and defeat the whole purpose of it?
At the same time, I could think of one hell of a way to share an umbrella.
Elrand, what are you gonna do with that kind of magic? Elrand?
Oh God, he's gonna spend a hundred years making his own dragon come to life if he could, isn't he...