Being fairly cheap, cheating Commander Tax for casts 3+, and having a bit of evasion makes this a competent package
Key Cards in the Necron Dynasties Magic the Gathering Decklist Szarekh, the Silent King (Commander) Szarekh, the Silent King is your commander and your engine
Gaining a level won't remove abilities that a Class had at a previous level
Rimefire Torque joins Adaptive Training Post with that same line of text, though this time its a tap ability so its harder to keep going off
Once you start playing two or more of these a turn you'll start seeing absurd turnouts, and they're actively busted with mass reanimation like Raise the Past, Return to the Ranks, and so on
In this deck it can remove finality counters from the artifacts you resurrect, letting you sacrifice and replay them again and again