Trephination kit - Revision history

Umbire the Phantom: /* Generation */ pothole

2026-04-05T10:00:26Z

‎Generation: pothole

Umbire the Phantom: detail

2026-04-05T10:00:04Z

detail

Umbire the Phantom: /* Generation */ tweaks

2026-02-28T09:48:41Z

‎Generation: tweaks

Umbire the Phantom: tweaks

2026-02-27T12:12:43Z

tweaks

Klepto: properly link "the college".

2026-01-29T03:51:51Z

properly link "the college".

Umbire the Phantom: /* Generation */ tweaks

2026-01-27T12:00:59Z

‎Generation: tweaks

Umbire the Phantom: copyedit up to description

2026-01-21T01:42:43Z

copyedit up to description

Klepto: correct research link.

2026-01-20T17:50:49Z

correct research link.

Klepto: created page.

2026-01-20T17:49:03Z

created page.

New page

{{tool
|color=metal color
|name=trephination kit
|cost=30
|weight=10
|material=metal
}}
A '''trephination kit''' is a type of [[charge]]able tool seen in [[dNetHack]], [[notdNetHack]] and [[notnotdNetHack]]. It is [[Item size (dNetHack)|medium sized]] and is usually made of [[metal]].

==Generation==
Trephinations make up {{frac|200}} of randomly generated tools. They are created with 1–24 charges, and will be [[blessed]] or cursed with an equal likelihood of {{frac|10}}. 
A blessed obsidian trephination kit is generated in the [[Caveman quest]]. 
Two trephination kits are generated in the [[Convict quest]] [[locate level]], one in a [[chest]] in the lower middle room and another, rusted, kit in the lower left supply room. 
One trephination kit is placed randomly on the [[Healer quest]] goal level. 
One trephination kit is present on the altar to the [[college]] in the [[User:Chris/dNethack/Undead_hunter_quest_page_draft|Undead Hunter quest]], in the top left room. 

[[Mad Grazi]] is generated with a glass trephination kit. 
Healer [[player monster]]s in the [[Madman quest]] are generated with a [[gold]] trephination kit and have their item color set to yellow.

==Description==
[[Apply]]ing a trephination kit with at least 10 [[insight]] allows for a character to perform three operations at a cost of one charge each:
* Trepanning "your brain". For a [[hero]] that is not currently [[polymorph]]ed or that has at least 20 insight, trepanning your brain will allow you to remove one currently slotted [[thought]]. The removed thought is then transformed into a [[bone]] (made of [[copper]] instead for [[clockwork]]s and [[plastic]] for [[android]]s) [[Tile (dNetHack)|tile]] scrimshawed with a symbol representing that thought, and can be [[read]] to replace it. The operation will halve current [[hp]], reduce [[sanity]] by 10, and reduce [[wisdom]], [[intelligence]] and [[constitution]] by 1 each. This attribute damage is not counted as [[abuse]] and can be fixed through [[restore ability]].
* Trepanning "your [[crystal skull]]s". Requires a crystal skull held in open inventory, allowing it to be accessed as a [[container]]. Any items put into the skull will appear in the inventory of the crystal skull's summoned monster as temporarily summoned items.
* "Putting parasites in your brain". This operation is closely tied to the [[parasitology]] [[research]] path and the [[lumen]] thought that [[neutral]] [[Undead Hunter]]s start the game with. A hero of any role who obtains this glyph may use this option to obtain parasitology upgrades, so long as they meet three prerequisites:
** The hero must have the lumen thought slotted and have at least 27 insight, at which point the thought becomes active.
** The hero must be carrying a [[parasite]] in open inventory.
** The hero must have performed sufficient research into parasitology to qualify for a new upgrade.

A trephination kit can hold up to 50 charges. Blessed charging adds {{rn1|10|6}} if it had less than 11 charges previously, or {{rn1|5|6}} if it had more. Uncursed charging always adds 1–5 charges.
Trephination kits cannot be put into crystal skulls.

==Messages==
{{message|The kit's medical supplies are exhausted.|You applied a trephination kit with no charges left.}}
{{message|You examine the drills in the kit, but have no idea how to use them!|You applied a trephination kit but lacked the insight necessary to operate it.}}
{{message|You can't get at your own brain right now!|You attempted to remove a thought while not in your base form with less than 20 insight.}}

{{variant-343}}
[[Category:dNetHack tools]]
[[Category:notdNetHack tools]]
[[Category:notnotdNetHack tools]]

@@ Line 20: / Line 20: @@
 The [[Mad Grazi]] is [[always generated with]] a [[glass]] trephination kit.
-[[Player monster (dNetHack)|Player monster]] [[Healer (dNetHack monster)|healers]] generated on the [[Madman quest]] are created with [[golden]] trephination kits.
+[[Player monster (dNetHack)|Player monster]] [[Healer (dNetHack monster)|healers]] generated on the [[Madperson quest]] are created with [[golden]] trephination kits.
 ==Description==

@@ Line 20: / Line 20: @@
 The [[Mad Grazi]] is [[always generated with]] a [[glass]] trephination kit.
-[[Player monster (dNetHack)|Player monster]] [[Healer (dNetHack monster)|healers]] generated on the [[Madman quest]] are created with [[golden]] yellow trephination kits.
+[[Player monster (dNetHack)|Player monster]] [[Healer (dNetHack monster)|healers]] generated on the [[Madman quest]] are created with [[golden]] trephination kits.
 ==Description==

@@ Line 18: / Line 18: @@
 * One trephination kit is present on the altar to [[the college]] in the [[Undead Hunter quest]], in the top left room.
-The [[Mad Grazi]] is [[always generated with]] a glass trephination kit.
+The [[Mad Grazi]] is [[always generated with]] a [[glass]] trephination kit.
-[[Healer (dNetHack monster)|Healer]] [[Player monster (dNetHack)|player monsters]] generated on the [[Madman quest]] are created with [[Gold (material)|gold]] yellow-colored trephination kits.
+[[Player monster (dNetHack)|Player monster]] [[Healer (dNetHack monster)|healers]] generated on the [[Madman quest]] are created with [[golden]] yellow trephination kits.
 ==Description==

@@ Line 16: / Line 16: @@
 * A trephination kit is placed in the [[chest]] within the warden's office on the [[Convict quest/dNetHack|Convict quest]] locate level during level creation. A [[rusty]] [[iron]] trephination kit is also placed in a specific location within the supply room full of [[iron chain]]s and [[heavy iron ball]]s on the locate level during level creation.
 * A trephination kit is placed randomly on the [[Healer quest/dNetHack|Healer quest]] goal level during level creation.
-* One trephination kit is present on the altar to the [[college]] in the [[Undead Hunter quest]], in the top left room.
+* One trephination kit is present on the altar to [[the college]] in the [[Undead Hunter quest]], in the top left room.
 The [[Mad Grazi]] is [[always generated with]] a glass trephination kit.
@@ Line 26: / Line 26: @@
 * Trepanning "your brain". For a [[hero]] that is not currently [[polymorph]]ed or that has at least 20 insight, trepanning your brain will allow you to remove one currently slotted [[thought]]. The removed thought is then transformed into a [[bone]] (made of [[copper]] instead for [[clockwork]]s and [[plastic]] for [[android]]s) [[Tile (dNetHack)|tile]] scrimshawed with a symbol representing that thought, and can be [[read]] to replace it. The operation will halve current [[hp]], reduce [[sanity]] by 10, and reduce [[wisdom]], [[intelligence]] and [[constitution]] by 1 each. This attribute damage is not counted as [[abuse]] and can be fixed through [[restore ability]].
 * Trepanning "your [[crystal skull]]s". Requires a crystal skull held in open inventory, allowing it to be accessed as a [[container]]. Any items put into the skull will appear in the inventory of the crystal skull's summoned monster as temporarily summoned items.
-* "Putting parasites in your brain". This operation is closely tied to the [[parasitology]] [[Research (dNetHack)|research]] path and the [[lumen]] thought that [[neutral]] [[Undead Hunter]]s start the game with. A hero of any role who obtains this glyph may use this option to obtain parasitology upgrades, so long as they meet three prerequisites:
+* "Putting parasites in your brain". This operation is closely tied to the [[parasitology]] [[Research (dNetHack)|research]] path and the weed thought that [[neutral]] [[Undead Hunter]]s start the game with. A hero of any role who obtains this glyph may use this option to obtain parasitology upgrades, so long as they meet three prerequisites:
 ** The hero must have the lumen thought slotted and have at least 27 insight, at which point the thought becomes active.
 ** The hero must be carrying a [[parasite]] in open inventory.

@@ Line 11: / Line 11: @@
 Trephination kits make up {{frac|200}} (0.5%) of all tools randomly generated on the ground, in general [[shop]]s or as [[death drop]]s. Randomly-generated trephination kits are generated with up to 24 charges, and their [[beatitude]] will be uncursed {{frac|4|5}} of the time, cursed {{frac|10}} of the time, and blessed {{frac|10}} of the time.
-Trephination kits can be found in various quest levels:
+Trephination kits can be found in some quest levels:
 * A blessed obsidian trephination kit is generated on the temple altar of the [[Caveman quest/dNetHack|Caveman quest]] home level during level creation.
@@ Line 21: / Line 21: @@
 [[Healer (dNetHack monster)|Healer]] [[Player monster (dNetHack)|player monsters]] generated on the [[Madman quest]] are created with [[Gold (material)|gold]] yellow-colored trephination kits.
-−
 ==Description==
 [[Apply]]ing a trephination kit with at least 10 [[insight]] allows for a character to perform three operations at a cost of one charge each:

@@ Line 6: / Line 6: @@
    |material=metal
 }}
-A '''trephination kit''' is a type of [[charge]]able tool seen in [[dNetHack]], [[notdNetHack]] and [[notnotdNetHack]]. It is [[Item size (dNetHack)|medium sized]] and is usually made of [[metal]].
+A '''trephination kit''' is a type of [[tool]] that appears in [[dNetHack]], [[notdNetHack]] and [[notnotdNetHack]]. It is a [[Item size (dNetHack)|medium-sized]] [[chargeable]] tool that has a [[Object materials (dNetHack)|base material]] of [[metal]].
 ==Generation==
-Trephinations make up {{frac|200}} of randomly generated tools. They are created with 1&ndash;24 charges, and will be [[blessed]] or cursed with an equal likelihood of {{frac|10}}. <br>
+Trephination kits make up {{frac|200}} (0.5%) of all tools randomly generated on the ground, in general [[shop]]s or as [[death drop]]s. Randomly-generated trephination kits are generated with up to 24 charges, and their [[beatitude]] will be uncursed {{frac|4|5}} of the time, cursed {{frac|10}} of the time, and blessed {{frac|10}} of the time.
-[[Mad Grazi]] is generated with a glass trephination kit. <br>
+Trephination kits can be found in various quest levels:
-Healer [[player monster]]s in the [[Madman quest]] are generated with a [[gold]] trephination kit and have their item color set to yellow.
+* A blessed obsidian trephination kit is generated on the temple altar of the [[Caveman quest/dNetHack|Caveman quest]] home level during level creation.
 ==Description==
 [[Apply]]ing a trephination kit with at least 10 [[insight]] allows for a character to perform three operations at a cost of one charge each: