For Prey Upon to be good, green needs to have bigger common creatures than every other color (particularly ones available on turns three and four) and for cheap, instant-speed interaction to be scarce
These estimates are rough because they are based on some quick calculations after testing with cards I own
This variant of Avacyn, Angel of Hope is likely to be divisive, and the thing that I love about it, how small Avacyn looks under the gaze and grasping hands of some unknown monster, is exactly what others will despise
This archetype may be used by the pilot specifically to disrupt powerful opponents by adding elements of chance and unpredictability to the game, which their own deck is better able to navigate, or may simply seek to create unexpected and unique board states that rarely exist in other games of Magic
And with all the options to fill your favorite kindred deck, what if there was a way to just bring out any of the above for free
If that becomes a serious problem, I could see using this to help fight it