Affinity is a cost reduction mechanic that incentivizes you to play lots of cheap artifacts
This card is frequently found in near-mint (NM) or lightly played (LP) conditions, but you will struggle to find it in heavily played (HP) conditions
Timetwister | Illustration by Mark Tedin So, the reserved list is a relic from the old days of Magic
You want to build your deck in such a way that you always reveal a Human when you cast this card, and ideally, so that you have choices and can take a good one for the situation
You can also make this a 0/20 and strike for the win with the help of Doran, the Siege Tower and friends
It's a cool card with an interesting design that plays off of both Jiang Yanggu and Mu Yanling's core elements, but I think for your average Planechase game, you'll likely have a better time with The Great Aerie