NAF – New artifacts with unique properties.

Maybe we could do something similar to the standard and extended versions, like NHF and NHF_E? The first would only contain balance adjustments for Multiplayer, while the second would include everything else. This way, we could accept practically any artifact ;)
Also, the same principle could be applied to NCF.

There are still many free IDs, so it's possible, but sooner or later, the space will run out. I could, of course, take a risk and try to change the second byte; maybe the game will accept it. Then the number will be practically unlimited (65535).
And NCF, in theory, can be expanded to 65535; 1000 is probably an artificial limitation. Or the game doesn't read more than a three-digit number, which is doubtful and very strange.

People will still want to see a lot of things, even imbalanced ones, in single-player, but in Multiplayer, it will be problematic.

For single-player, if the campaign or scenario is really cool, like WOE, I will definitely create the necessary artifacts; they just won't appear in place of random ones