Crawl Monster Info

Partake of my vision. Partake of my curse.

Henzell says...

God of the death knights. Encourages and helps enable players to kill as much of the floor as possible without leaving the level. You only gain Yredelemnul piety while the black torch is lit, it can only be lit once per level and will be extinguished when you leave the level. See next entry for details. For pre-0.32, see yred[6] and [7].
Foes that die in your umbra have a chance of becoming friendly zombies or spectrals that last until they are destroyed or you leave the level. While the black torch is lit, you can gain piety by slaying foes. At 1* Yred gifts you allies whenever you light the torch to help you get started, scaling with piety and xl. For abilities see next entry
While the torch is lit, Yred allows you to Hurl Torchlight (2*), damaging foes and empowering undead allies in a 3x3 blast. Regardless of the torch, you can Bind Souls (4*) to keep 1 inter-level-traveling version of a monster or trap all nearby foes in Fathomless Shackles (5*), draining them, preventing movement, and healing the player.
Will put you under penance if you use a holy wrath branded weapon or read a scroll of holy word.
bind soul targets a monster of human intelligence with 81% or more of its max HP remaining. If it dies within a number of turns equal to (3/4 * Invocations) + 2 it becomes a permanent spectral ally. The spectral ally may cast the same spells as the monster killed to create it. You may only have 1 enslaved soul at a time.
Before 0.32, corpses were passively reaped into zombie allies that could be traded for stronger allies or spent for invocations, and based piety on friendly undead in LOS. Granted recall friendly undead, area of effect vampiric draining, and bind soul.
Before 0.28, at 1* piety granted {injury mirror} and at 3* gifted you permanent undead servants. Minions: Mummy, Wight, Flying skull (2-5), Wraith, Vampire, Phantasmal warrior, Skeletal warrior, Flayed ghost, Death cob, Ghoul, Bone dragon, Profane servitor. Bone dragons and profane servitors could be no more than 3 total. Prior to 0.16, this was uncapped.
Piety works the same as piety on kills for most gods as long as the torch is lit. It is no longer related to undead raised, and does not come in "batches" at the end of the floor. The flavor text Yred gives you when leaving the floor only indicates what % of piety-eligible (non-undead) monsters on the floor you killed with the torch up.