Cards like Magebane Lizard and Cindervines double down on the noncreature punishment your Gruul commander encourages
When you do, put an indestructible counter on target creature you control
The -2 also leaves something to be desired in that it can only recur permanents that the ability itself mills, but even still, this will be a useful ability everywhere from Vintage Cube to Spooky Cube
like a fixed vorapede Oh no, how will you even begin to fathom to win the game with a card that is merely a trampling 14/14 due to the crippling -1/-1 counter
One thumb up from me, though I imagine fans of the MMO will get more out of it
Selfish, but the fact that you can use it multiple times per turn makes it potentially very powerful, especially given Helitrooper packs built-in evasion