Yeenaghu

& Yeenaghu (No tile)
Difficulty	58
Attacks	Weapon 3d6 physical, weapon 2d8 confusion, claw 1d6 paralyze, spellcasting 2d6 magic missile

& Yeenaghu (No tile)
Difficulty	58
Attacks	Weapon 3d6 physical, weapon 2d8 confusion, claw 1d6 paralyze, spellcasting 2d6 magic missile
Base level	44
Base experience	??
Speed	18
Base AC	−10
Base MR	80
Alignment	-15 (chaotic)
Frequency (by normal means)	Unique
Genocidable	No
Weight	900
Nutritional value	500
Size	Large
Resistances	Fire resistance (100%), Poison resistance, Magic missile resistance (100%), Free action, Stun resistance
Resistances conveyed	None
Yeenaghu: can fly. can see invisible creatures. is poisonous to eat. does not eat. (*) is not a valid polymorphable form. is a demon. is a lord to its kind. is male. is normally generated hostile. can follow you to other levels. is nasty. can pick up weapons and food. wants the Amulet of Yendor. has infravision. can be seen through infravision. normally appears only in Gehennom. never leaves a corpse.
Reference	monst.c, line 104

Yeenaghu is GnollHack's version of Yeenoghu. He is a powerful demon lord gnoll capable of paralyzing and confusing attacks, shooting magic missiles, and summoning ghouls, gnolls, and other demons.

Generation

Yeenaghu is not a valid polymorph form or genocide target.

Yeenaghu is one of two demon lords alongside Juiblex that can be summoned by performing same-race sacrifice; he will be peaceful to gnolls, and to chaotic heroes of other races, and hostile to everyone else. Note that, in Gehennom, altars will try to summon Demogorgon first!

Yeenaghu also has a chance of being summoned by demon gating, or via the summon nasties monster spell being cast either in Gehennom or by the Wizard of Yendor. In GnollHack, players can also summon nasties with the "greater Yendorian summoning" spell.

If not generated earlier, Yeenaghu appears in one of the chambers of Yeenaghu's Domain, a special level is always 2-to-8 levels above the bottom of Gehennom. He is always generated with the Triple-Headed Flail of Yeenaghu, an artifact elite triple-headed flail.

Notes

Each turn, Yeenaghu will try to summon demons, gnolls, and ghouls, at the same time:

• His demon gating has a 10% chance to work.
• His "gnoll gating" has a 30% chance to work.
• His "ghoul gating" has a 15% chance to work.

Yeenaghu's Favor

Gnolls want to meet Yeenaghu, their creator and patron. Yeenaghu will give them a wish if spoken to under one of the following circumstances:

• If you are chaotic, and your alignment is "devout"-or-better (this requires a score of 14 or higher)
• If you are not lawful, and you get lucky when chatting with him
• If you have the Howling Flail (the first gnoll sacrifice gift) in your inventory

At zero Luck, the chance is roughly 1-in-3.

After receiving one wish, further chats have their wish-granting chance divided by three. If Yeenaghu doesn't give a wish when spoken to, he disappears (without dying).