Squirrels are a creature type most strongly associated with green and black, token production, sacrifice, and strength in numbers. A few Squirrels look harmless; several dozen of them usually mean somebody is about to die.
The Unbeatable Squirrel Girl creates a Squirrel whenever she enters or attacks and can multiply your existing Squirrel army, while Deep Forest Hermit and Deranged Hermit create and strengthen an immediate swarm. Camellia, the Seedmiser adds another angle by turning Food and sacrifice synergies into even more furry bodies.