>>96467663
the skaven thing is during the end times, they are sacking one lizardmen city and they happen on their storages of old one tech, they play with random dials they find on one machine until they accidentally hit some combination and a melodious voice "like an elf but speaking an alien language" speaks through the machine, they promptly pick up their pistols and shoot the machine to bits.

chainswords and bolters and stuff have been demonic gifts (generally from khorne) for fantasy warriors in realm of chaos, and one makes a cameo in total war

during the shadow over albion campaign in 6th edition there were various artifacts of the old ones that people could use as magic items that were quite obviously just a power sword, a power fist and some other thing, down to the exact same game rules