2/2s every turn, lifelink on the larger body, and a similar saboteur ability to Gix, Yawgmoth Praetor all point towards this being a strong addition to grindy creature decks
Both commanders fiddle with counters in some way, with Inspirit directly calling out the artifact subtheme in the deck
Killian, Ink Duelist , for example, reduces the cost of all those kill spells by two mana, and Kaervek, the Punisher gives you a double use for your kill spells
But that's a necessary price to pay if you want to overwhelm your opponents with some of the biggest, baddest creatures in Magic: The Gathering
you can then play them on that turn
It seems pretty clear to me that were going to see a lot of Growth-Chamber Guardian at SCG Indianapolis, so what does that mean for the bigger picture of Standard