Two options are included: Numbered Blank - To be numbered So you can pick any of the 40 that you want
Do note that this also includes purchasing duplicates of Supporter cards available in the in-game shop, but it is not recommended as it is better to save your Shop Tickets, and you will only get a few Shinedust from these cards
Later in the game you can also use it to reanimate a walker
As usual, the artifacts that have a generic mana cost are alphabetized together and appear numerically between the multicolored cards and the nonbasic lands
For me, it was the toss-up between working with the Vibranium tokens, using [[Yotian Dissident]], or working with the +1/+1 counters sub-theme
So while it wasnt truly official outside of tournaments until 1999, it was already widely accepted before then