Not sure if there's a better place for this, but I thought I should let you know that Parrying Shot gives block based on unblocked damage dealt on *last* unblocked damage before you play the card, not based on the damage dealt by the card itself.
Viewing post in Willow Mod Version 1.0.6 Changelog comments
I am aware of that issue, unfortunately, from my understanding, it's something that would require an engine-level fix, so it's a little out of my hands.
I could rework parrying shot to get around the problem, but Willow's defensive options are already not that great, so I'm hesitant to take away/rework one of the better (in my estimation) defensive cards.