Artifact suggestions..

[Aielyn]

The sparkling wand is really the Wand of Many Wonders

--Wand of Many Wonders--

This artifact, when zapped, will produce an entirely random and unpredictable effect. Should be used with extreme caution.

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Some possible effects.
-You zap the wand. It suddenly becomes very windy. (The level is filled with random hostile vortices.)
-You zap the wand. You feel experienced. +1 million xps.
-You zap the wand. You suddenly feel very different. (PC changes gender)
-You zap the wand. Your body begins to grow in strange ways (PC changes race; may kill the PC if their age is incompatible with their new race).
-You zap the wand. You suddenly stand somewhere very different. (PC is teleported to a random location somewhere in the world).
-You zap the wand. You feel very altered. (Randomizes the PC's stats; sum of stats remains the same)
-You zap the wand. You feel skilled. (All skills set to 100).
-You zap the wand. You feel very skilled. (PC gains all skills, set to 100).
-You zap the wand. You feel your morals changing. (PC changes to a random alignment).
-You zap the wand. You feel like starting over. (PC level reduced to 1).
-You zap the wand. What do you wish for?
-You zap the wand. Something is lying at your feet (random artifact).
-You zap the wand. You suddenly feel very strange. (Adds/removes 10 random intrinsics).
-You zap the wand. You feel invincible (boosts all stats temporarily to 99).
-You zap the wand. Your equipment turns to dust.
-You zap the wand. You feel blessed. (All equipment is blessed, PC receives +Fate +Luck).
-You zap the wand. Your potions suddenly look different. (All potions are changed to random types).
-You zap the wand. Your items suddenly vanish. (Items are scattered randomly about the level).
-You zap the wand. Your weapon suddenly seems very strange to you. (Reduces all weapon skills to 0).
-You zap the wand. You suddenly feel you have completed your quest. (Victory conditions satisfied).
-You zap the wand. The world suddenly seems much more dangerous. (All non-hostile creatures are replaced by hostile daemons of varying types).
-You zap the wand. The wand disappears.

Some of these sound way too harsh or way too powerful. But the basic idea is good.

For one, messing with experience/level is a bit absurd. And giving all skills maximum levels messes with things.

I really do like, though, the "randomise stats, with sum remaining fixed" one, the "temporary boost of stats to max" one, the gender change, the alignment change one, and some transformational ones. And adding dangers, etc, would work well, too.

Here's some that I'd make it do:

Kept from your list:
-You zap the wand. You suddenly feel very different. (PC changes gender)
-You zap the wand. You feel very altered. (Randomizes the PC's stats; sum of stats remains the same)
-You zap the wand. You feel your morals changing. (PC changes to a random alignment).
-You zap the wand. What do you wish for?
-You zap the wand. Something is lying at your feet (random artifact).
-You zap the wand. You feel invincible (boosts all stats temporarily to 99).
-You zap the wand. The wand disappears.

From your list, but altered (bold shows alteration):
-You zap the wand. You sense a sudden change in the air. (The level is filled with random hostile vortices.)
-You zap the wand. You feel something intrinsically different. (Adds/removes 3 random intrinsics).
-You zap the wand. You feel skilled. (One random skill set to 100, all other skills experience one increase).
-You zap the wand. The world suddenly seems more dangerous. (Danger level of every location increased by 1).
-You zap the wand. You feel blessed. (Random 50% of equipment is blessed, PC receives permanent blessing).
-You zap the wand. Your weapon suddenly seems very strange to you. (All weapon skills reduced by 75%).

New:
-You zap the wand. You feel like you've just been taught a lesson. (Gain three skills at level 100 (randomised, may be existing skills), lose one random skill entirely)
-You zap the wand. You feel like experiencing more things. (Doubles all experience gained for next 10d100 turns)
-You zap the wand. You grow an additional pair of arms. (Adds two new ring slots and two more hands, also reduces appearance by 1)
-You zap the wand. Nothing seems to happen. (version 1: Literally nothing happens)
-You zap the wand. Nothing seems to happen. (version 2: Toggles "your long lost brother showed up" type intrinsic)
-You zap the wand. Nothing seems to happen. (version 3: Character will fall sick with a very strong sickness in 10d10 turns)
-You zap the wand. Nothing seems to happen. (version 4: If wand zapped again immediately after this, teleportitis and teleport control both granted)
-You zap the wand. You feel like taking great steps. (follows version 4 of Nothing seems to happen - teleportitis and teleport control granted)
-You zap the wand. Nothing seems to happen. (version 5: Special quest activated - a random NPC in one town must be spoken to, in order to complete activation)
-You zap the wand. Your skin crawls. (Level fills with various worms and insects)
-You zap the wand. You sense a shift in the aura of the level. (All monsters on level gain teleportitis, including yourself and pets)
-You zap the wand. The air suddenly sounds very musty. (Level filled with various undead and unlife)
-You zap the wand. The walls around you fade. (Level becomes comparable to the Big Room from ADoM - all walls removed)
-You zap the wand. The walls close in around you. (all squares around you replaced with rock, petrifying any petrifiable being in those spaces - hope you have some means of digging or teleporting to get out of it)
-You zap the wand. The air suddenly becomes very, very still. (all petrifiable beings on level, including pets, petrified, except PC)
-You zap the wand. The air heats up rapidly. (Level becomes hot like the Tower of Eternal Flames)
-You zap the wand. You find it hard to remember where you've been. (50% of known information about all levels lost randomly)
-You zap the wand. Your pack suddenly feels unusually light. (All piles of items become single items - so, if you have 5 blessed potions of water, the stack will become just one blessed potion of water)
-You zap the wand. Please choose an item. (version 1: You choose an item. That item is duplicated (unless it's an artifact, in which case a random non-artifact item of same type is generated).)
-You zap the wand. Please choose an item. (version 2: You choose an item. That item is destroyed (unless it's an artifact, in which case it is cursed).)
-You zap the wand. Please choose an item. (version 3: You choose an item. Item becomes immune to most destruction (still can be destroyed by gods or by version 2 of this effect).)
-You zap the wand. Please choose an item. (version 4: You choose an item. All non-artifact items of that type are randomly regenerated)
-You zap the wand. You shudder violently. (Level is filled with traps)
-You zap the wand. Your muscles grow rapidly. (Strength increased by 20, all worn items destroyed (artifacts fall off), Dexterity decreased by 5)
-You zap the wand. You lose your sense of direction. (For 20d20 turns, all directions reversed - press up to go down, etc)
-You zap the wand. You feel that this was not at all a good idea. (+Curse +Doom -FateSmiles -Lucky, which remain locked in unless cured by the gods or you get lucky, and get this effect again, which undoes the effect - items granting Lucky or Fate Smiles will not work)
-You zap the wand. You feel reborn. (Age reset to starting age, stats restored to starting stats, piety reset to starting piety, and any gained body parts, etc, lost)

This is actually pretty fun.