A forbidden demonic technique that allows a cultivator to rapidly increase their cultivation base by absorbing the essence, blood, and cultivation of other cultivators. It drastically reduces the time needed for meditation and cultivation. However, it has fatal flaws: it only works below the Foundation Establishment stage, permanently prevents the user from forming a Golden Core, and carries a high risk of backlash and qi deviation. It is universally reviled and hunted by both righteous and demonic paths.