Heggen reassures me that they are thoughtful about what new Secret Lair cards are doing to strategies outside of Commander, saying we're not trying to accidentally ruin those formats by casually printing hyper-powerful cards into them. That said, the concept of mechanically unique Secret Lair cards existing at all has been a hot topic in the community regardless of power level
Artifact decks are masters at spewing out hands full of artifacts onto the battlefield at record speeds, so this enchantment will be creating an army of 1/1's you can use for defense / offence / combos in no time at all
While costing a lot of mana (13), you do get a discount for card types, which will likely reduce Emrakuls cost to (9) or (10)
Average CMC of 1 and nothing bigger than a 3 to hit makes Bob a happy boy
The second thing it highlights is the toolbox approach to singleton
Nami can overwrite the rules of the game so that instead of losing whenever you run out of cards in your deck, you win the game