A new single-level “heaven” branch, reachable by levelporting to a negative level, that is filled with angels guarding the “Holy Scepter”, a new artifact with unspecified properties. There is an exit portal on the level, and the angelic guards are peaceful unless angered or the Scepter is taken. If you steal the Scepter, you can sacrifice it on Moloch’s high altar to get a bad ending to the game.

New type of terrain, “fire terrain”, a square that is on fire. It displays as an orange period. (If this will be too nasty to people who play with color off, the glyph should perhaps be changed.)

• Fire terrain has a certain amount of burning wood material on it.
• Standing next to or on fire terrain grants cold resistance, but standing on top of fire terrain has the same effect as a fire trap whenever you end your turn on it.
• The fire eventually burns out and reverts to normal floor, the duration determined by the total weight of the burning objects.
• Killing a wood golem with fire or burning more than a certain weight of objects on a square creates fire terrain on that space.
• Throwing burnables onto a fire trap may make them spontaneously combust and produce fire terrain.
• Fire terrain can be used to cook corpses.
• You can create fire terrain by applying a lit candle to a space with burnables on it
• You can also create it by applying a tinderbox to a space, which is a chargeable non-magical tool. Archeologists and Rangers start with one.
• Fires provide a light source of radius 3, but cannot be moved.
• Monster AI will not travel over fire if the monster is not resistant.

Consistent with the Owned Artifacts Patch, wishing for dragon armor in EvilHack should instead summon a dragon of the wished-for color that you must fight for the scales. (It will be guaranteed to drop them, unlike a regular dragon.)

When you wish for an object and leave certain fields (erosionproofing, enchantment, etc) unspecified, the game fills them in for you with the most useful and safe values.

Exploding pets should not count against you when you kill them. (Not stated if this should apply only to pets which explode upon death, or it should apply to pets that explode even not upon death.

A new type of worm that has 2 tails instead of 1.

Boxing glove trap, a trap that hits the victim with a boxing glove (for stunning, potentially?). When untrapped, it can produce a random pair of gloves, biased towards normal leather gloves and maybe away from fumble gloves.

Termite, a monster that eats wooden items it finds on the ground, and see them as treats if they are a pet.

Controlled polymorph does not allow you to become whichever polyable monster in the game you want. Instead, you are presented with a menu of several different random polyable monsters to choose one of.

Tourists can get Basic skill in club due to having played baseball and being familiar with bats, and Skilled in riding because riding is a popular tourist attraction.

Ghosts left behind by coaligned players are peaceful and grudge against hostile-to-the-player monsters. Ghosts killed by brainlessness do not behave like this, nor do ghosts not generated with bones.

Allow “numpad” and “num_pad” as acceptable aliases for the real option “number_pad” in the config file.

Artifact wand that causes monsters trying to zap wands at the wielder to drop them instead.

Polymorphing while wearing crystal plate mail, leather armor, or iron mail can cause you to merge with the armor and turn into that respective material of golem (glass, leather, or iron), with the armor returning unbroken when you revert back to your normal form.

Option to configure your character to be nearsighted, which prevents you from seeing things more than a few spaces away from you unless you’re wearing lenses. You can also be farsighted, which means you can’t read scrolls or spellbook unless you’re wearing lenses.

Giant spiders grudge killer bees.

Wishing for the Amulet of Yendor doesn’t fail and give you a fake if you have ever held it in the past. In that case, a wish for it will reclaim it from wherever it was. The monster who was currently holding it may appear, too, however.

Artifact magic lamp that gives 3 wishes instead of 1.

This might be a useful addition to NetHack Fourk’s Aladdin’s Palace level.

Tinning huge corpses produces the tin as usual, but just makes the corpse partially eaten instead of destroying it.

Reading mail does not break illiterate conduct.

Equipment or artifact set bonuses, such that carrying or equipping all of them provides some bonus effect.

Procedurally generate the game-equivalent of Elbereth each game (the literal string “Elbereth” does nothing special anymore), and make it fairly likely to appear somewhere in the Dungeons of Doom.

Eucalyptus leaves always taste terrible, except to certain herbivorous polyforms (such as koalas and other zouthern animals in SLASH’EM).

Usage fees can never exceed the original cost of an item, and when you buy the item, any usage fee is removed (it’s only charged if you use the item without buying).

Non-cursed rings of hunger don’t drain excess nutrition when you are Hungry, and slow digestion rings don’t slow your digestion when you’re oversatiated.

Monsters apply mirrors at you if you are a nymph or umber hulk.

Make the Castle not a graveyard level, and compensate for this by altering wraith corpse drop odds somehow.

When you complete your Quest and return the artifact back to your Quest leader, and if you return to them with the Amulet, you are rewarded with a (one-time) hero’s feast. This restores HP and fills your nutrition to just below Satiated (and increments the turn counter?)

Player monsters can pray and become invulnerable and have their problems fixed by their god.

When a black pudding is created from a sink, rings buried beneath the sink may be placed into the inventory of the pudding.

Attempting to wear armor while already wearing armor in that slot will prompt you to remove it.

Conflictless conduct: never have a monster attack another monster while influenced by conflict. Would be best if you can safely ring-test conflict, perhaps it gives some message like “You feel aggravation” or “You feel irate” when wearing it (these messages would be shared with the ring of aggravate monster so as not to be unambiguous).

Potion of antivenom/antidote which cancels out any Str loss from poison. (Not really that useful if poison is simple Str loss; blessed restore ability is superior, but if poison is an actual status effect, it would be more useful.)

Watchmen will attack monsters that they see attacking you unprovoked.

Allow a count for eating, or else have the character stop once they hit Satiated. (Note that numerous people have pointed out flaws with allowing the player to specify exactly how much they want to eat - for instance, it becomes trivial to stretch out a lizard corpse to every bite it provides).

Warn the player before they melee a monster with passive attacks.

Your quest leader can heal you if you come to them injured or sick.

Dragons can cast spells.

If two-way level communication is implemented (meaning that trapdoors and such deterministically go to a specific space on a specific lower level), allow the player to go back up through holes in the ceiling with levitation or flying, or allow them to place ladders there that become a < to do the same thing.

When rock-eating is implemented (or in variants that already have it), eating a luckstone gives you -1, +1, or +2 Luck depending on the beatitude of the stone.

You can #force boulders where there is a monster behind the boulder to displace it, or crush it if it is in/on a pit or a hole. Based on Strength, only works if monster is medium or smaller. Always displaces unsolid monsters, of course.

Store type “sushi restaurant”, which sells sea monster corpses, kelp fronds, various sushi rolls, and sushi mats, tools which allow you to combine kelp and sea monster corpses into higher-nutrition sushi rolls. Sushi rolls include kraken sushi, eel wrap, and shark tempura.

Sickness resistance negates the effects of potions of sickness. However, a cursed potion of sickness will now give you fatal illness instead of the normal poison effects.

Services center: a shop containing shopkeepers who offer services but have no goods to sell.

Djinni (except on the Plane of Air) may drop a scroll or wand of wishing when killed. But when you kill a djinni, all future djinni will spawn hostile.

Soldiers occasionally drop piccolos, which act similarly to wooden flutes (but made of metal).

This could also be done in the object materials patch without adding a new item for piccolos, by simply having them drop metal flutes.

Shop generation chance increases for every level with no shop, and decreases/is reset when one is generated.

Conflict removes murder penalties since you acted in self-defense.

Fumble boots cause you to toss and turn in your sleep if you are sleeping, making you wake up sooner.

Throwing a cockatrice corpse into water turns it into a hard floor, or possibly ice, with the corpse buried in the new floor.

Amulets can be flushed down toilets to identify them.

Applying heat to loadstones demagnetizes them and turns them into flint stones.

Magnet traps that attract metal items out of your inventory, but also attract loadstones and are a means of getting rid of them.

You can apply an amulet of strangulation to an adjacent monster (that has a head and neck) which will strangle it in 5 turns. Possibly only if the monster is sleeping or paralyzed.

You can invoke a ring of hunger to make yourself more hungry immediately so you can eat dragon or giant corpses. (You have to be wearing it and have it identified.)

Maybe rather than having all rings of hunger capable of doing this, have it be a single artifact ring of hunger. Suggested names for this artifact include Overeater, Bottomless Pit, Cookie Monster, Glutton, and The Hungering.

Command (generalization of #tip, or #dump, have both been suggested) to transfer all items from one container into another container without having to temporarily place them in your inventory. It would be better but perhaps harder to implement if you could pick and choose which items were being transferred, rather than all of them.

Artifact arrow that auto-returns to your pack and cannot break. But there is only one of it, so it can’t be multishot.

Merge the P and b monster classes, on the grounds that puddings and blobs are both classes of amorphous monsters that are sparsely populated. (Some attempts have been made to also merge the j monster class in.)