Three years ago, I announced the completion of my Brad Sorensen refractor rainbow. I was still two cards shy of actual completion, but since I had never once seen the gold refractor (/50) or 1/1 superfractor for sale, I didn't have much hope of ever finishing it off.
In order, base, refractor, x-fractor, prism refractor, red, pink, orange, GOLD, camo, blue wave, blue, purple, sepia, black. DONE.
And this will probably be the only rainbow I ever chase.