AVENGERS INFINITY: When Thor attacks only characters of 100 points or more, you may choose to modify attack or damage +1.

This is related, in part, to my other thread from last night about Thorin Oakenshield.

Assuming that the text above is correct, which it might not be, how long do these modifications stay in effect? That attack? The turn? The game?

Rulebook, pg. 28-

Thanks, Lantern, as always. Don't know how I missed that one.