mtg blood token commander deck - Secret Lair Drop Series Building Asmora with Blood Tokens

On the 2-9, going from 4 mana to 9 is crazy good value

The goal of an ally deck is to cast ally creatures, so triggering this once or twice a turn is within reason

7) Unhinged or No? Readers were very excited by the news of Unhinged

That being said, none of these particular engines really does anything by themselves, as anyone who's played down an early OrnithopterOrnithopter or Phyrexian ReclamationPhyrexian Reclamation and then had them sat there doing nothing for four turns straight can tell you

[60] FNM tournaments can act as a stepping-stone to more competitive play

This artifact-making value engine of a card used to make waves in Modern, and even though it got a semi-recent reprint in the first Modern Horizons, it's still valued at $53 (all prices from MTGGoldfish)