That means the cards in The Big Score (especially Mythics like Bristlebud Farmer) have a very high price ceiling if/when they find a deck where they shine
He can search your library for an equipment card when he enters play, and pairs well with the Commander deck version of himself Cloud, Ex-SOLDIER
You were then allowed to cast the exiled card whenever, including during your second main phase
It can provide a pretty huge creature with limited work, and it can even recur itself, which can lead it to become a problem
Not only that, but on future turns you can attack with the Mulldrifter and then blink it for a blocker and two more cards, making it an all-around great option in most situations
The Yu-Gi-Oh game night I attended drew about 20 or so people