The three types are Items, Supporters, and Stadium cards, with each having a vital role in enhancing your deck or troubling your opponent
Jor Kadeen, First Goldwarden Simple, but maybe a bit unexciting
While we can argue about whether Signets themselves are simply too good for Standard, I think most people would agree that if they aren't too good, they are, at the very least, right on the border
Rotom Have Many Other Uses
Sets like Brilliant Stars and Lost Origin still have high-value chase cards
However, under normal circumstances, you have a good window to cast it and its quite strong, as Domris Ambush hits planeswalkers while buffing your creatures so you dont lose any tempo casting a removal spell