"Soul Suck"
If Heine remembered correctly, that was its name.
Through Octopus Brother's tireless efforts, he gradually unraveled its structure.
The spirit communication arts Heine currently mastered were more akin to entreaty arts.
Simply asking the Yuanling, "Help me out," and that was it.
Yet this skill was closer to a "spell".
It even embraced the concept of "necromancy."
It required no entreaties or communication but directly utilized a silver substance Heine dubbed as Origin Material.
Yuanling was living, but Origin Material was dead.
But this posed a new problem.
The previous two add-ons had no interaction with the environment; they only consumed the player's own spiritual power.
Which is the silver Soul Substance that composed the Soulfire ā something that needed replenishment through sleep.
However, Soul Suck clearly involved engagement with the Origin Material in the environment.
This obviously wasn't suitable for all environments.