NAF – New artifacts with unique properties.

The thing is, in Heroes 5, the "War Machines" skill is not a priority, but rather a secondary one. It is rarely developed, with players preferring to focus on luck, attack, defense, magic, and so on. In essence, this skill is weak compared to the others.

On small maps, heroes like Kaspar, Hafiz, Dalek, and Vittorio are prioritized; they develop much faster, and players enjoy developing War Machines for them, often winning as a result. The larger the map, the less effective War Machines become. However, this process cannot be stopped, only slightly slowed down: you will always depend on one or two strong units, whose strength cannot grow infinitely (as it is strictly tied to your skills and stats, which are limited). If the usefulness of War Machines on medium/large maps increases to approximately the level of other skills, then on small maps they will become not just strong, but practically an uncompromising alternative, completely determining the player's victory. And yes, it is worth noting that the pace set by War Machines at the beginning of the game gives you a certain advantage that your opponent still needs to catch up on. Therefore, even when the map is large and War Machines are no longer effective on their own, they have still done their job by providing a good start, and that is not as insignificant as it may seem.

And finally, there are only 2 artifacts for War Machines, and not a single composite one!

But yes, what I said does not negate the fact that artifacts for War Machines can still be added. Especially those that work well on medium-sized maps (and have a corresponding value and drop chance).