mobilize cards mtg (Card) put a +1/+1 counter on that creature MOBILIZE - Death by 1000

An Ob Nixilis thats actually a great demon commander

He can be Shifted for a reduced Ink cost of three, and he has abilities that make him well worth getting in play

Sauron, the Dark Lord Sauron, the Dark Lord is a very strong threat on its own

With Walking Ballista already a primary inclusion, adding Aerith isnt too far-fetched

Thorna and Twigtooth is an aggressively costed Arena-only commander, sadly you won't remove many stun counters with its attack trigger, but otherwise, any cool drawback counters you want to get rid of become a huge advantage for you

In fact, I know you can, because the other commander for the Tyranids is already much higher on this list