Guess there will be a ban soon in some format.
Mox Displacer Kitten is a great pet for Breya and Urza
3 mana teferi bounces 0 mana artifact and the kitty flickers teferi and you repeat to draw your entire deck and generate mana if its a mox of some kind.
Its incredible flexible for combos, and even just for the value of flickering planeswalkers or protecting your cards from spot removal , it does it all without even trying.
The possibilities for crazy combos are insane!