Other items for suggested space race items :
Greenskins : Horn of Urgok (for lack of anything better)
Lizardmen : Blade of Cocacila (takes off wizard powers permanently and negating other magical items)
Dark Elf : The sword (weapon, rather) of Khaine would be appropriate
Kislev : Apple of kislev (leadership jewel, symbol of the Tzars)
I agree with the fact that the Imperial era needs more tech, but since the Dwarfs are stagnating due to their respect of tradition which stops their engineers from inventing anything totally new, and the fact that the Imperials are just starting to get into such kind of technology, with the Steam Tank, there are not so many other techs than the ones you already have
Greenskins : Horn of Urgok (for lack of anything better)
Lizardmen : Blade of Cocacila (takes off wizard powers permanently and negating other magical items)
Dark Elf : The sword (weapon, rather) of Khaine would be appropriate

Kislev : Apple of kislev (leadership jewel, symbol of the Tzars)
I agree with the fact that the Imperial era needs more tech, but since the Dwarfs are stagnating due to their respect of tradition which stops their engineers from inventing anything totally new, and the fact that the Imperials are just starting to get into such kind of technology, with the Steam Tank, there are not so many other techs than the ones you already have
