Fumulus, the Infestation Fumulus, the Infestation rewards you for building a deck full of sac outlets and edicts, and its a good reason to run less-played black insects like Brood of Cockroaches
Alternatively, you may want to push Karlov off to a supporting role in a list that focuses on a theme of +1/+1 counters like Ghave, Guru of Spores
That number might be a typo or exaggeration, but even still this isnt someones kiddie printing press were talking about
However, the power of Growth Spiral lies in the fact that it doesn't require you to tap out to play an additional land, meaning you can keep countermagic up and still ramp
Personally, I am feral for the confetti foil of this Bitterblossom printing, but you dont need a fancy one to throw into your deck
Wizards of the Coast is far from done with its crossover decks for Magic: The Gathering