The blue in the deck is a very light touch, dipping into the Blue-Black zombies from Amonkhet (Gleaming Overseer, Spark Reaper) and Innistrad (Havengul Lich, Diregraf Captain, Champion of the Perished), as well as a handful of counterspells (Sinister Sabotage, Undermine) and card draw (Distant Melody, Deep Analysis)
If you're looking to add some to your decks, here are ten that are powerful, popular or both: Wall of Omens/Wall of Blossoms If there's one thing commander players love doing, it's drawing cards, and in the right deck these two Walls can do that a lot
This offers a lot of potential value, especially with proliferate cards like Experimental Augury and Flux Channeler helping you get to four counters faster
you do not need to transform the creature
a lot of people tend to not consider the strategy too much of a threat, leaving you alone to develop your battlefield and not have to worry too much about being attacked early on