Similar to Himura Genma of Ninja Scroll, Tenzen's technique is one of regeneration and immortality. He was born sharing his body with a symbiotic being that usually conceals itself so that only its closed eyes are visible as a wart/growth on Tenzen's ears. The creature awakens whenever Tenzen is wounded or killed, moving through his body to regenerate him by "eating" his wounds, thereby restoring whatever ravages of time or battle Tenzen might experience. Thanks to his powers, by the time of Basilisk's beginning, Tenzen was already well over 200 years old though physically he looks no older than 30. Even when decapitated, Tenzen can regenerate if someone holds his head to his body while his symbiote seals the cut.