Disney Lorcana Attack of the Vine
Good thing Karn isnt yelling at some random cloud
Our proxy can be used for kitchen table magic, a proxy for deck testing, act as additional copies of those expensive cards that you already own, players who looking for altered art of a card that they like or to use as their Commander, cube, EDH / CEDH games with friends who welcome proxies
Add in a Phyrexian Arena variant that can hit opponents and you're suddenly very interested
Not being weak to counter magic is nice, but two is twice as much as one, and the restriction of mana value three or less makes it a liability to delve creatures and typically anything that gets reanimated
As far as I understand, sacrificing five creatures with Thromok makes 25 counters, six makes 36, ten makes 100