Organ surgery: mastery and errors

Operate at or above the organ’s Anatomy requirement when the organ or body matters. Below the threshold, an imperfect extraction can destroy the organ or leave a Surgeon’s Error; an imperfect insertion can consume the replacement without installing it.

Requirements rise with organ grade

Organ	Anatomy for grades 1 / 2 / 3
Skin	1 / 3 / 6
Bones	2 / 4 / 7
Skull	3 / 5 / 8
Heart	5 / 9 / 13
Brain	8 / 10 / 13
Guts	9 / 11 / 13

The slot’s technology must be learned too. An unknown organ slot is not revealed by simply raising mastery. Skin and Bones, Skull and Teeth, Advanced Autopsy and Master Autopsy unlock different parts of the body.

A permanent mastery-thirteen setup

The Anatomy branch can contribute 5, the Master Surgeon’s kit 4 and Expert anatomist another 4 at the autopsy table. Together they reach 13, enough for the top-grade Heart, Brain and Guts operations in the current extracted table.

The kit must be equipped on the toolbar and the specialist perk must apply to the operation. Temporary food or Third Eye Salt can close a different setup’s gap, but check the displayed success before the operation starts and before a later buff expires.

Autopsy Table II does not lower these organ requirements. Upgrading the furniture is not a substitute for the missing Anatomy.

Preserve the candidate body

A corpse intended for resurrection needs all six organs and no Surgeon’s Error. A failed operation can therefore lose more than the extracted item: it can remove the body from the usable worker pool.

Picking pocket items such as Fat and Blood is different from extracting organs and does not use the same surgery success check. For a burial candidate, that simpler operation can remove early red skulls without risking the organ slots. For a worker candidate, those same red skulls have value as talent capacity.

Organ Improvers make top-grade replacements but do not remove their insertion requirements. Autopsy and corpses compares the two destinations before an operation is committed.