While their attacks dont inflict damage, they do give you an edge
Sakazukis versatility against various meta decks is notable
Heres an almost free 12/12, with vigilance, reach, ward, and evasion
But, the inventive, themed play spaces are one of the main reasons all TCG fans should stop in
Furthermore, there are many more widely played formats (such as Tiny Leaders) I could provide a link to, but the reality is that if you include all those formats in your definition of previously banned, some person will eventually just invent a format that bans every card but basic lands, and therefore will be able to tutor all cards
Zimone herself is already a very powerful Commander, and her deck is going to put fear into players without even having to modify the deck