"When attacking, you may receive any number of stress tokens to choose an equal number of defense dice. The defender must reroll those dice."
Does the forced rerolls happen before or after the defender modified his dice? I'd think before, so just after rolling them. Just want to go sure.
But when exactly I need to call the number of dice to be rerolled? You can read it like you need to take stress tokens in the step when you roll your red dice.
Isn't Zuckus too strong for 1 point if you can just wait for the defender rolls and you let them just reroll for example the evade results?