An artifact luckstone which increases or decreases Luck by 5 rather than the ordinary 3 for a luckstone when carried. (Luck might still be capped at -13 and +13 for technical reasons, rather than being allowed to go to +15 and -15.)

Artifact luckstone Somebody Else’s Problem that confers invisibility and stealth while carried.

Luckstones, when wielded or thrown at a monster, have an inherent +3 to hit.

Revamp luck so that it’s mostly permanent and tied to game milestones such as Oracle, Sokoban completion, clearing Medusa, passing the Castle, finishing the Quest, and getting crowned. All of these increase base luck by 1 (like the full moon benefit, only more so.) Carried luckitems adjust by -2 if they’re “net cursed”, +2 if net uncursed, and +4 if net blessed. All other things that affect luck still do, with no way to prevent them timing out back to the new base value.

The gaze attack of an evil eye can destroy or reduce the beatitude state of luckstones you are carrying.

Luck ideas:

• Luckstones don’t remove luck timeout, they merely extend it.
• Luck is much less controllable, impossible to get any clues about except through enlightenment, and various random events (like what?) can give or remove luck. A skilled player would know how to bias the odds towards luck-increasing events. Controllable sources of gaining luck like sacrifice and throwing gems at unicorns are removed. It no longer times out.
• The luck timeout rate is less predictable, and a luckstone will help but it might still time out quickly if the RNG hates you.
• The base number that luck times out to is equal to the total number of luckstones in your inventory (so carrying 2 noncursed luckstones means luck times out to +2). Luckstones’ weight is increased.
• Remove luckstones in favor of an amulet of luck. Luck timeout can no longer be slotless.
• Luck times out at a rate of 1 point per (600*(number of luckitems + 1)) turns.
• Do away with luck timeout entirely in order to make it impossible to micromanage luck. Luck is now conferred entirely by luckitems. The problem with this approach is that NetHack has about two ways to gain timing-out luck and many, many ways to lose it.
• Luck can be gained by enchanting luckstones.
• Different types of luckitems which stack with other luckitems but not with each other, like a four-leaf clover you can get from leprechauns.

Increase the damage of slung touchstones. Thrown luckstones retain their lowish damage but have a chance of getting “lucky” hits that do much more damage or instakill monsters.

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.