Unlike mass-produced cards that saw print runs in the millions, each Illustrator card went to a specific contest winner, creating a provenance that's as rare as the card itself
(One day I'll get to my theory of "hooking"how cards need to interconnect mechanically to make a set design work holistically.) Design is very much about playing with various pieces, some of which will advance and some of which will not
Lets get to it, then
In addition, if you have ways to gain extra combat steps you can take everyone out in just one turn
Unfortunately, unlike some of the best Rainbow Secret Rares from Sun & Moon, Reshiram and Zekrom's shared scene with N is incredibly detailed, making the rainbow recolor more of a distraction than an enhancement
He is, of course, vanquished in the end, however