As Crepundi Cubus grow old and eventually metamorphose into Cerivtude, their plastic hearts grow so big and wise that they gain the miraculous ability to float on air. They pass over towns at night in the wintertime, trailing colorful northern lights behind them that spread a sense of peace and joy to the residents below. They are extremely stoic and solitary, but still look out for children from afar-- a dejected Cervitude that feels it has failed to adequately protect someone loses it's glow and it's ability to fly. There is a subculture of toy collectors who restore broken or vintage Cervitude to working order, a service unfortunately not provided by Zoanetic Labs. Cervitude are always obedient and polite to their trainers, but the ones who are kept as collectors items seem to yearn for the days when they were played with.

Can be found in mountainous areas.