The reward part of the Secret Room card: Tainted Spring reads: " Any hero on the secret room may keep this card. You may discard this card at any time to roll 2 red power dice. Each hero recovers heart equal to the heart rolled. Discard this card at the end of the quest."
The triggering condition here is "any time", thus, that can be done outside of the turn of
the hero
who has the Secret Room card. Can
the hero
discard the card when he is attacked? In any step of the attack? For example in step 5 (Deal Damage) to prevent getting knocked out?
The question essentially is: Do you think Tainted Spring counts as an interrupt? My feeling is no, as no specific triggering condition that would allow it to be used as an interrupt is given. Do you agree?