It would be one thing if it was only doubling its own counters, of which it starts with four, but it doubles the counters on all of your creatures when it attacks
This isnt quite true in many other formats mostly because of Moderns diversity, many decks are more all-in than similar incarnations in other formats
Its a great one to watch, as prices could jump if it goes out of print
It becomes cheaper to cast as the game progresses and the graveyard fills up, and it even lets you take control of your opponent so you can make them enact their own demise
When this legendary artificer enters the battlefield, you draw a card for each artifact you control, so its a huge payoff in token-heavy builds
It strikes a good balance of putting throwbacks to older cards and introducing new, interesting ideas