But I also want to make sure the card falls within acceptable boundaries for qualities that are a bit harder to determine: power level and complexity
Sardelis suggests the play pattern will often be "creating the quirkiest token you can and then copying it a whole bunch", so perhaps there'll be some unusual squirrel tokens within
Contagion Clasp, Yawgmoth, Thran Physician, and Glistening Oil all come to mind as must-haves, and Im sure you can think of some more when you build the deck
Aside from its novelty, Extermination is rather on-rate for a removal spell
The ability that defines Filigree Attendant's power works in all zones, not just the battlefield
This can set up the GY for future plays while also being able to be a board breaker, as it can target a card and destroy it if it is destroyed by battle