This card is unique in that it allows for the creatures it destroys to be regenerated, providing the user a bit of an out when decimating everything else on the field
Note that the mana symbol is in the extort rules text, which means it doesn't count towards color identity, so you can play this in mono-black
Not only is the Power Nine mostly artifacts, but some of the most broken cards I can think of are artifacts: Skullclamp, Umezawa's Jitte, and Smuggler's Copter all demonstrate the power of the card type before I even scratch the surface of fast mana like Mana Crypt and Sol Ring
Ugin Planeswalkers have a history of being pretty damn good and this one is certainly a powerhouse
These two have had a few other cards as well, and Sada's, especially, have been powerful, leading her to become one of the most iconic trainers of the era and making her cards desired by collectors
[54] Quinty was finished in 1989, and published by Namco