Theres Bruce Banner, a 1/1 blue who can transform into the Hulk with an Enrage condition that gives him a +1/+1 counter when damaged and a second attack phase
I think Commander players, at least non-cEDH ones, tend to be more willing to embrace chaos or make risky plays than competitive players
Duke Ulder Ravengard If theres one thing that hurts Duke Ulder Ravengard the most, its that it costs 6 mana in a color pair that doesnt have access to green mana
Urza, Academy Headmaster is another favorite from the set (an Un-set planeswalker is sure to be a hit), and non-foils are worth a few bucks
Blessing of Light At the beginning of combat on your turn, put two +1/+1 counters on another target creature you control
Meticulously painted by hand, the art is dynamic and her counter spell looks so effortless, befitting the card