The obvious choices for this style deck is any artifact that costs zero mana, like Lotus Petal, Mishras Bauble, and Lions Eye Diamond
Since Zirda, the Dawnwaker only cares about permanents, it could show up in a deck that is mostly (or exclusively) spells (people have mentioned this as a possibility in Vintage, where some decks incidentally meet Zirda, the Dawnwaker's restriction, although whether or not getting a random 3/3 in hand to start the game is worth a sideboard slot remains to be seen)
That creature doesn't leave or enter the battlefield
A few Double Exposure texture foil Legendaries like Kaito , Tyvar , and Niko were valued from $60 to $70, except Valgavoth
Ive accidentally ruined valuable cards to an unfortunate drink spillage before, and Ill never be bought in that predicament again let me tell you