Failing in creating objects

[Viajero]

I am rather new here but have never encountered this!

Trying to create The Flailing Hands, a death object, had 2 mages failing simultaneously in last turn. WTF? anyone knows why? nothing in the description of the item saying that the chances of failing are higher etc. Any idea?

Thanks

EDIT: I actually gave orders to construct to 3 mages, one was successfull... is this an artifact?

[BesucherXia]

You are forging an unique item, and thus can only one succeed.

[Ironhawk]

All items at construction level 8 are artifacts. There can only be one copy of an artifact in the game at any point in time.

[Viajero]

thanks!