Every time a forge blesses a metallic item dipped in it, it should have a small chance of drying up afterwards. Currently this is infinitely repeatable to bless any quantity of metal items since it has no chance of drying up afterwards.

Add a “magic forge” which is like a magic fountain but with forges. It can generate wherever forges generate randomly. Dipping a nonartifact metal weapon in it always grants it 1 random object property, and then the forge either becomes nonmagic or disappears.

If you use Ogresmasher as your hammer at a forge, the resulting forged object should have a small chance of being imbued with an object property.

It should be possible to forge spell staves, possibly by combining a quarterstaff with multiple spellbooks of the appropriate school. The only problem is this is not very flavorful with a red-hot forge, which might suggest that there should be some alternate crafting method that can be used to create them.

Certain races should be able to forge using materials other races can’t:

• Dwarves can forge with crystal items, and possibly stone.
• Orcs can forge with stone items. Bone would be more flavorful for orcs, but less flavorful in being something that can actually be forged with.

It should be possible to combine chromatic dragon scales with a shield of reflection at a forge to make a “chromatic shield” which provides the same benefits but in shield form. This is so tortles who get chromatic scales can get some use out of them.

If you use an artifact hammer in forging, it should have some special effects, perhaps dependent on which artifact it is. For instance, using Hammer of the Gods should always result in a blessed item.

Glass objects should be eligible for forging, since the temperatures involved in a forge are more than enough to melt and recast glass.

Also, it should be possible to forge pieces of worthless glass together to make decorative ornaments, which are worth either score or can be sold for spare money.

Some mechanic (maybe involving forges?) that consumes valuable gems to add enchantment to weapons or rings, because gems tend to become useless at a fairly early point in the game.

You should be able to use a forge to melt down gold items and turn them into gold pieces.

Mithril items cannot be forged. It’s too good of a material to apply to arbitrary items, and there is lore which would back up it not being a material an amateur is capable of smithing.

You can use a forge to combine elemental wands with weapons, destroying the wand and conferring an object property of cold, fire, or shock on the weapon.

When a thrown potion of oil lands on (or possibly even passes over) a furnace/forge, it ignites and explodes.

The chance of you using a forge to repair an item is dependent on player stats rather than being a total random crap shoot.

It’s not possible to dip an item into a forge and have nothing happen. Something should happen, if only a message, in all cases.