This magic has potential! My initial intrigue is how far cause and affect goes: like if someone tips over a glass within this radius, will the contents spill? How far does this magic reach -- like if someone had an argument within a 30 foot radius of magic mastery, how would any sort of verbal fight work within that constraint?

Also, in terms of physical attacks, what would not being injured actually look like? For instance, if he were to be run through with a sword somehow, what would that look like due to the magic?

It's definitely an interesting idea, but with only so much information it seems very broad in terms of what it can do and how the magic will apply to different contexts definitely matters.