So... A funny story about Tormod's Crypt and Mishra's Bauble. I have a Padeem deck and I can't do station combo because I don't have KCI.... So made a Jank 4 card station combo with Tormod's Crypt/Mishra's since they are targetable by salvaging station and self sac as an artifact going to grave for summoning station. So the combo works lol
There's a cycle of cards in Nemisis that have the option to cast for free: Refreshing Rain, Mogg Salvage, Massacre aaaand I can't recall the blue or white ones, but the blue one is pricey
Not particularly great but a spicy pick Jewelled amulet is an interesting 0 drop artifact that uses charge counters to give you coloured mana. It's good for proliferate decks or just storing a mana for the next turn.
I never reveal my zero drop spice; especially for artifacts. Mad sleepers out there and if you didnt know lotus petal when it was $7 then you may not want to drop $20 or more unless you can recur it
There are a lot of cards I have that went up in price. I only find out they went up from videos like this. I have close to a million cards. I can't look all of them up. I have common mint condition revived/3rd edition cards that are worth some money if they are graded.
This list had a few of my favorite cards on it, paradise mantle, lotus petal... all I would add are some of the obvious picks like moxen and force of will.