MultiVersus Stream Testing Grounds - Shields?! Can Multiversus convince ME that they are good?

I certainly will see! (Because clearly they need to convince ME)
I'm vehemently against the idea of shields but that's why there is testing grounds and I am going to test them to see if t hey can make a believer out of me. Come join me to see if this game needs shields or should this tech stick to smash bros and let Multiversus be different?
What does this button do?
streamelements...