+2% Chance for Sorcerer Attack to Stun
I cannot find that variable anywhere else though (I checked the dragon, the attack, and the projectiles files). Some things are not defined directly in fields that are visible. Based on the research description, it should be affecting the normal attack.
If it is like all the other chance-based things in this game, then every attack would have a new 2/100 chance of stunning. But, after a few thousand attacks, it’s extremely unlikely you haven’t seen this stun at least once.
If the default chance to stun is zero, most of the percent modifiers are done via multiplication and not addition (form what I can tell). If that is the case here, then 0.2*0=0…
Not sure, but definitely would like to hear from others who have completed this research.