Airborne and Contaminated have abilities that add shields or hearts depending on infection tokens on the hero. My group sees the wording as pretty open ended on how they can be discarded per attack. Currently, we play as many tokens as desired up to the total can be discarded per attack. I tend to think this doesn't work because it says 1 token, but it doesn't say per attack or only 1. We also played that when using blast, the shield effects would guard each target i.e. discard 2 tokens, each defense roll gets +2 shields.
I think, essentially, I'd like an explanation of the timing of when the tokens are removed, or clarification of when "after rolling dice" relates, would offer the most insight.
Also curious how this works with Sweep. If one hero has a token, can I discard it to add a heart to the whole attack? If 4 heroes would be affected, can I discard them all? That seems OP...