With Setback's Wrong Time and Place card, the card text is the following:
The first time a hero target would be dealt damage each turn, redirect that damage to Setback, or remove X tokens from your unlucky pool to redirect that damage to a target, where X = the amount of damage.
Must X be equal to the amount of damage being redirected? Or could Setback spend more than the amount, and deal more damage?
X must equal the amount of damage being redirected.