Can't imagine that this is intentional, but stunning surge states it refunds the cost (2 Mortification) if it crits. And it does. Now if you use dual wielding the cost is "refunded" twice. So if I had 2 Mortification left, I use stunning blow with stunning surge and get double crit, I will end up with 4 Mortification. This means that with good accuracy you actually can spam your abilities because you can always build up more Mortification for free.

Hi AeonsLegend,

 

Thanks for the post! This definitely seems to be unintended. I will get this added in our database for evaluation.

 

best,

 

-Caleb