Proponents argue this would be a huge win for the format
Additionally this deck brings in more items (perfect for Tamatoa item deck builders) and adds new faces like Winnie the Pooh and Judy Hopps
Mono U could likely support a rare mill deck (Ruin Crab, Maddening Cacophony, Field Research, Glacial Grasp, blockers like Skyclave Squid to fill the curve, etc), though most Mono-Blue inclined decks will likely just end up UB
It's literally an Unclaimed Territory 99.99% of the time as spending 6(!) total mana to make a 1/1 Sliver token is such an awful rate that it might as well not even be on the card -- if you regularly activate it then I'd recommend rebuilding the deck, maybe add some more card draw so you have better things to spend your mana on
If you want a powerful, unique, and pretty budget five-color commander, Urtet is still my number one option for you
Enter Blech, Loafing Pest, a 3/4 legendary Pest creature that costs one generic, one green, and one black mana