Corruption exists in the ancient domain as much as nuclear radiation exists in our domain.
I don't want to dictate what is common sense and what isn't though. Many would agree with some and many would agree against it. If you can draw a direct parallel of an item to its real-life equivalent, then you can use it. I will give my opinion on some items though.
Potions: berzio, blindness, booze, carrot juice, cure poison, oil, oil of rust removal, poison, sickness, troll blood, water. All others, not allowed.
If alchemy allows for the creation of above mentioned potions, recipe can be used within reason. For example, booze from pepper petal and water would be allowed or blindness from burb root and carrot juice. Non-common-sense ingredients could possibly also be used. Maybe cure poison made from booze and potion of boost toughness. You can pretend ingredient potions are just "alchemical chemical mixtures" if you want to really. Alchemical explosions aren't realistic.
Penetration weapons seem to function using some sort of dimension-phasing technology. Not allowed.
Mindcrafters depend if you believe that telepathic and telekinetic powers exist in ADOM. Since several monsters exist in the Drakalor Chain who have powers over the character's mind, one could say yes. It is also assumed that it is these strong powers of mind which allow a character to control teleportation. I don't know the precise rules of Unbeliever but I haven't seen anyone teleport into my house yet.
Scrolls of education could be used. I would like to think all the reading I do at school teaches me something. Consider them written manuals or diagrams. Expect the occasional strange result though. *imagines a scroll with the images of a dagger with an arrow directing it into something's back*
Ring of the High Kings for guardian passage is understandable. I could totally see this happening in a real life quest to save the world. The ring is unique and recognizable (it was worn by the ruler of the entire known world) and the eternal guardian could be a really old dude.
Crystals are just shiny rocks. You can pick them up and sell them as precious stones, but not as magical devices.
Certainly more prefixes. Balanced, barbaric, barbed, brutal, corrupting (if we agree corruption is essential part of ADOM), extra-heavy, fragile, heavy, hefty, light, masterwork, murderous, nasty, unwieldy, weeping, and wicked.
As for missile weapons, no penetrating or winged missiles prefixes and no suffixes. One could make an argument for the logic behind ammo of darkness, claiming that while there is no "darkness", certain ammunitions could be used to effectively blind your opponent.
I agree with Dudley's scroll list.
When you start looking at wands, rings, amulets and etc. they should not be allowed. These are the fantasy icons of curvy stick and lumps of metal seeming to hold mystic powers. Artifacts are also disallowed on the basis they are indestructable gifts from some higher power. Artifacts should be allowed to be generated but using them for any purpose other than rational reasons is disallowed.
Some possible explanations of artifact use:
Chaos orbs - To beat the game
Chaos trinity - If all other sources of corruption is accepted as inevitable in ADOM world, so should these. The power granted by wearing these items can be associated with the twisting powers of corruption on character's body.
Raw steel - Similar reasoning as the chaos trinity
Perion's mithril plate mail - A really sweet suit of plate mail. This artifact is so underpowered, most won't argue against someone using it.
Axe of the minotaur emperor - Giant cow emperor's axe is truly this bad ass. If someone is willing and brave enough to navigate the minotaur labyrinth with Unbeliever restrictions, he should be rewarded with the use of this weapon.
Golden gladius - This is essentially the counter strike knife. Also acceptable to give to grizzled gladiator in exchange for training.
Scythe of corruption - Corruption is part of ADOM.
Ring of the High Kings - Only for Eternal Guardian passage.
Boots of great speed - Similar reasoning as the chaos trinity.
I said it before, and I'll say it again. If I knew scripture like you, I'd prolly be an athiest too.. -gut
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