Older cards have received errata to have an additional paragraph that reads "[This permanent] enters the battlefield tapped," and they now have hideaway 4
There are almost always powerful artifacts to destroy in Commander
Like those, it was banned to avoid the perceived-barrier-to-entry, but was strong enough to be a candidate for banning even without the optics especially in long games where the card draw yields inevitability over time
With their powers combined...barely 1 Breya, Etherium ShaperBreya, Etherium Shaper headcount
This was a good set outside of Siege Rhino, but thats less important or cool than Siege Rhino
Tapping and drawing a card has massive value, and even when that trick isn't needed, you can essentially "cycle" the card