A new race whose primary feature is that it eats minerals: gets nutrition mainly from rocks, may be able to eat metals, and gains limited spell-like abilities based on the last precious gem they consumed. A couple non-comprehensive examples:

• Eating a ruby grants the power to cast fireballs.
• Eating a jet stone grants the power to make clouds of darkness.

The abilities could be triggered using #monster, and would probably have a finite pool of uses, after which they can no longer be used. Eating another gem before this pool runs out would swap in new abilities and either give a fresh pool of uses or add to the existing one.

A headless race, “Akephalos/oi”, which has no head and its face on its chest, so it is incapable of wearing helms, and is blinded (and cannot drink potions) if a shirt or body armor is worn.

Also a dullahan/cephalophore race which Knights can play as. They are also headless and cannot wear helms, but they carry their head as an item and can place/throw it elsewhere. Vision is based on where the head is, so it is possible to leave the head somewhere and have the body moving around blindly in a different area of the map.

A system where your god grants you cool abilities, but only if you actively obey randomly generated edicts they put forth. Examples:

• “I declare the wearing of leather forbidden!” (persistent)
• “I declare Abipoppo the Shopkeeper must die!” (one-time)

If your god orders you to do something that would make you suffer alignment, anger, murder, or Luck penalties, you are not punished for that.

Conceieved as a new race, or an extension of the angelic race, but could also apply to Priests or Infidels.

A race which is very strong, with great abilities and intrinsics including drain resistance from XL1, but with the caveat that they instantly die of old age upon reaching XL30.

Intended for variants whose XP curve doesn’t make reaching experience level 30 through pure combat nearly impossible. Also, a safeguard might have to be put in place so that you cannot intentionally get smited by a god or gamble on polymorphing into your own race to lose levels intentionally.

Djinn role: the primary gimmick of it is that you are able to access three wishes, through #invoke or some other mechanism, one each at experience levels 10, 20, and 30. You are not able to get wishes from any other source; the wish fails (perhaps a friendly djinni from a lamp will make some comment about how you don’t need more wishes or they can’t grant wishes to fellow djinni).

A race whose gimmick is to continually lose Constitution points every couple hundred turns; going below 1 (or 3?) results in death.

Nymph race very similar to dNetHack’s yuki-onna, but based on regular NetHack nymphs (so no association with cold and no iron weapons). Has the same unarmed-attack-automatic-stealing ability that yuki-onna have, and has infinite carry capacity, but low HP.

A race where you start polymorphed into a low level monster and with every level you gain, you can polymorph into a stronger monster.

Revenant race. Only available for roles you have died playing and didn’t leave bones. Gets death-magic resistance and unbreathing from XL1, has an automatic counterattacking kick. Does not have starting gear; any starting gear your role has is scattered randomly across dungeon level 1. Cannot start with a pet.

Aquaman role/race, which starts with magical breathing, a +1 trident, and an oilskin sack. Only regenerates health when in water. If a race, should be able to walk around on dry land (so merfolk are probably out, perhaps merlings or half-merfolk would work). Can drown surrounding enemies. Starts with scrolls of flood.