They can be played alongside high-cost cards in order to spend your extra ink and develop your board, they can get buffed by a Support character like Rolly and become a cheap way to trade up into bigger threats, and Lucky can discover them when you use his ability Good as New, making them more valuable in your deck than in your hand
The blitz assault Wave of Rats is the only new card to really sink its teeth into that blitz mechanic, and while you've already got blitz built into this card (no need for Henzie's additional ability there), being able to bring this onslaught back time and time again is going to prove useful when you're running a sacrifice-heavy deck like Riveteer Rampage
Thats how good it is in a duelpretty strong, right
It is strictly business. Illustrated by Wayne Reynolds Standard Legal Alchemy Legal Pioneer Legal Historic Legal Modern Legal Brawl Legal Legacy Legal Comp
All in all, the power level of this deck is pretty high, and when added up to the amazing number of unique Commander cards and the great singles, it makes the decks price worth it