Brief introduction of space necromancer

Necrons is a fictional alien mechanical race in Warhammer 40000 series. They have changed from the original flesh and blood to mechanical warriors, and their history is beyond imagination, even surpassing the Eldarians. They have unparalleled science and technology and have been dormant in a still grave for tens of millions of years. But in the end, they all began to wake up, and it was their pursuit to let the space necromancer regain the hegemony of the galaxy.