Touch of the Shinigami

As an action, you call forth the power of a shinigami, a yokai of death. You touch a creature and potentially cause it to die instantly, at the same time, you are reduced to 0 hit points and must begin making death saving throws. If the creature you touch has 150 hp or fewer, it dies instantly. If not, then the creature takes 22d6 of necrotic damage, and you take 11d6 necrotic damage.