Marvel United
Are KO'd Heroes ignored by game effects until they stand up?
The rulebook's KO section says a KO'd Hero is ignored by all game effects, and the designer's posts agree.
Yes. A KO'd Hero is ignored by all positive and negative effects. It cannot take damage, Crisis or action tokens, be given tokens, or draw or discard until the start of its next turn. Its special abilities stop working, while its face-up Storyline icons stay usable.