Add a themed room commemorating the long-lived tactic of pudding farming. It has the following properties:

• It is a huge room, possibly a variant of the “Huge room” themed room with no subroom.
• On one space in the middle of the room is the pudding farmer, a random player monster.
  • They generate at level 15-30, as they do on the Astral Plane, but don’t have the same equipment as they would get on the Astral Plane, just the regular gear a player monster would get. Possibly some nicer gear under the assumption they’ve farmed it off the puddings.
  • They are hostile to the player, unless of the same role, in which case they are peaceful.
  • The pudding farmer also carries a thoroughly rusty -3 knife or stiletto, their Puddingbane, though it is not named as such.
  • Messages and farlook show their name as having replaced their rank title with “Pudding Farmer”, e.g. “Fred the Pudding Farmer”.
• The remaining spaces in the room have some reasonably high chance of spawning a black pudding, with varying degrees of reduced current and maximum HP.
• There may be a sink somewhere on the room’s floor, from which the initial pudding came.
• No globs of pudding on the floor from already-killed puddings; the thematic thing would be to have pudding corpses, which no longer exist in vanilla. Globs would imply the player monster has been pudding farming in NetHack 3.6 or later, which doesn’t make much sense.
• The minimum level difficulty of this room is 4, though that seems awfully low given how dangerous it’s likely to be. It could be based on the difficulty of black puddings, such as the difficulty of a black pudding + 3.
• One option to cut down on the gimmickiness of it is to have the corpse of a player monster, possibly with some gear, but not the player monster themselves, implying they slipped up and fell victim to the puddings.
• Since it was possible to pudding farm brown puddings in earlier versions of NetHack, there could be some chance that this room consists of brown puddings instead, which could then appear at a slightly lower difficulty and would lack a sink. Though this would be strange in the above case of there being a corpse rather than a player monster, since brown puddings cannot deal damage (maybe they choked?)

New role based on a “loup du noir” archetype, possibly called the Lycanthrope - you start with a pelt, a new sort of cloak-slot armor that polymorphs you into a specific type of monster when you wear it. You also are inflicted with some sort of delayed lycanthropy - you won’t randomly polymorph into a monster like with standard lycanthropy, but after not using a pelt for a while, you do start feeling the urge to put one on, and if you still refuse, you are eventually compelled to put one on. (It isn’t specified what happens if you get rid of your pelt(s) by the time you would be compelled to wear one; possibly you just die from insanity, or else the addiction is implemented in some other way like continuous worsening HP damage.)

The form you get from wearing a pelt has some boosted stats from the base form - in particular, your carrying capacity and damage would be better than the stat blocks for the monsters suggest.

You could start with either a “default” pelt which is not very good, but can be turned into an ideal one later, or start with a specific animal’s pelt, which you can control with the pettype option. This role never starts with a pet.

Pelts might also work as a standalone concept or one that works with a druid, ranger, or caveman role:

• You can obtain a pelt by using a knife to skin the corpse of some monster that would reasonably have a pelt. This will probably be an occupation, and either its time or success rate will vary based on your knife skill and if you have a role-specific bonus.
• By using some sort of magic (instead of it being inherent to a role), you can transform into the animal whose pelt you are wearing.
• Pelts confer some benefit when worn as a cloak besides the ability to polymorph, which varies depending on the monster species, such as a boost to damage.

Add a system for casting ritual spells: more powerful and more expensive spells which have some esoteric effects you can’t get otherwise. The main differences between ritual and normal spellcasting are that they consume valuable, hopefully non-renewable components, take a number of turns to cast instead of taking effect instantly, and may require you to be in or set up certain circumstances.

Various ritual spells that have been proposed:

• Ball spells which consume a gem as focus and create a ball of elemental power that hits surrounding squares but not you. (Long casting times would probably make rituals infeasible for combat though.)
• Temporarily increase your carry cap by a great amount. (Other new intrinsics as required.)
• Resurrect a corpse as a tame monster (necromancy).
• Grant temporary intrinsic life saving.
• Single controlled polymorph with a greatly increased duration.
• Summon a demon, demon lord, or demon prince. Requires 5 cursed candles and a marker (to draw the classic pentagram). If summoning a named demon lord, it’s either random or there’s some expensive way to control who shows up. The demon lord could be peaceful, but with current behavior this is useless. Possibly summoning them allows you to make a pact with them.
• Remove the graveyard status from a level (would need to be expensive, and perhaps involve the Book of the Dead, and multiple different headstones).
• Grow a tree. This consumes at least a piece of fruit. For anti-farming the tree should probably not produce fruit or bees when kicked.
• Create a portal between two levels of your choice (doesn’t work with the Amulet obviously, but otherwise works)
• Create an artifact (that is, you somehow imbue an item with properties it can’t normally get).
• Bless items. Consumes a blessed scroll of remove curse.
• Genocide a genocidable monster. Consumes a figurine of that monster plus other costly things.
• Reverse genocide a monster. The monster may or may not have to be normally reverse-genocidable. Consumes a figurine of that monster plus other moderately expensive things.
• Charge something. Requires a rare ingredient - perhaps a dilithium crystal.
• Summon tame elemental(s). Among other things, ingredients include: a potion of water, any beatitude (water); a rock (earth); lit candles, a lit oil lamp, or a lit potion of oil (fire); an amulet of magical breathing (air).
• Create a magic lamp. Needs an oil lamp (of course) and a figurine or mask of a djinni (or possibly a nearby live djinni).
• Make the current level non-teleport. Requires a scroll of teleportation and that the caster be standing on an anti-magic field at (?) either the start or the end of the ritual.
• Create a fountain. Requires a statue of a medium-sized or larger monster, which gets destroyed (by turning it into the centerpiece of the fountain). There may be potential for wishing abuse; perhaps the fountain should be flagged so that it can’t produce a wish-granting water demon.
• Turn a regular knife into an athame. Components include other bladed weapons with positive enchantments adding up to 20 or something; all of these charges will be drained to +0 in the creation of the athame. The resulting athame is +0, regardless of the charges on the component weapons or original knife.
• Create a tame golem or golems. Requires a large amount of total weight of objects made out of the golem’s material.
• Summon a coaligned angel or other minion of your deity as a pet.
• Create a tame wood nymph from a tree (only once per tree).

Ritual spells come in spellbooks like usual, but aren’t stored in your spell list. Instead, reading the spellbook prompts you if you want to begin its ritual and tells you the necessary ingredients and circumstances you need to satisfy as preconditions. If you meet all the conditions and answer yes, you initiate the ritual. (For simplicity, this should probably burn up / expend all the components instantly.) You cannot begin a ritual while in the process of casting another ritual; this should probably be implemented as a precondition.

Apart from the component cost, rituals act as a constant drain on your Pw until the ritual is complete. If something distracts you in the middle of the ritual, you can go take care of it and then resume the ritual as long as you have the Pw left to finish it. (You could also drink gain energy during the ritual.) The only way for a ritual to fail, possibly backfiring with bad effects, is for you to run out of Pw while it is incomplete.

In addition to its preconditions, each ritual also has some postconditions: common to all rituals is that you have been casting the ritual for at least some length of time, but there may be others, such as standing on the square where you began the ritual, or have another item, or kill a monster, or something. There may also be other conditions such as “moving off the space where the ritual started breaks and halts the ritual”.

Every time you stop casting a ritual (whether it succeeded or failed), it increments the spellbook’s spestudied field; the book will eventually disintegrate after casting it a certain number of times.

Rogues start with a stack of knives instead of daggers, but their dagger skill cap isn’t changed; if a Rogue wants to use daggers, they have to go find some themselves rather than beginning the game with them.