This is going to be very ugly in fractal-SoPa decks...
Before this version the 0 attack would be a good stop gap...
After the buff to SoPa, it may not be good enough to maintain balance.
Basically, you get a free extra creature for every creature that gets summoned... When all of those start growing +2 attack per turn, things will get ugly.
With several of these in play, thats going to add up fast...
The pity of it is, this would be really fun in a rail-gun deck and might actually make the strategy more viable (outside of cata-titans anyway)
3 of these + 3 catapults, then just lock and load armadilgos!
