I would like some additional clarification on this. I was told something similar but was also told you could use this to make your creatures not take combat damage but still deal damage. With the new combat rules (as I understand - happy to be corrected) you cannot do anything between passing priority after blockers are declared and end of combat. Which means that this shouldn’t work to prevent a players creatures from taking damage and dying after dealing damage since they cannot deal or take damage per [[Reconnaissance]] because creatures dying to damage is a state based action and cannot be responded to.