What It Does

This single-use consumable applies Hermit Sage at the Pal Surgery Table . The surgery itself is free; the implant is consumed. The passive is the strongest sanity passive in the game:

• SAN drains 50% slower — far ahead of Heart of the Immovable King (-20%); it's the passive that makes a round-the-clock Insomnia worker sustainable.
• Work Speed -20% — give it to slow background workers (ranch, farm, transport), not dedicated crafters; that job wants Demon’s Hand instead.
• World Tree harvestables won't vanish when approached — the shared World Tree effect, covering both the Pal and its trainer.

Where to Get It

Disposable implants come from one place: the Ancient Relic Recycler . Every recycled Ancient Relic — any grade, including cheap Decayed ones — rolls exactly one implant from a 16-implant pool, so this one lands at 6.25% per recycle. The only other source of the passive is a lucky roll on wild Pals spawned inside the World Tree. Because the implant is one-and-done, spend it on a finished worker. See the Ancient Relics guide for the reward tables and the implants guide for how surgery works.