This is my personal list, although theres a lot which could be changed, given SPYRAL essentially has no locks whatsoever, and invites the use of external packages like the aforementioned Naturia
Flotsam and Jetsam Riffraff Amethyst already has a Flotsam/Jetsam combo, so why not give Emerald one
In the current meta, there are few options to combat Special Energy plays aside from Temple of Sinnoh so Enhanced Hammer will no doubt have usage
You need a ton of mana for casting this to be worthwhile, and you just can't get there in Limited often enough
While past Un-set tokens are valuable, it's a bit dangerous to generalize this value to Unstable , simply because we don't know enough about the tokens
Since I have no real appreciation for the video game references, my tastes will be mostly geared towards powerful cards I may want to try for Commander combined with the cards whose artwork I appreciate most