I believe it was this past March that I saw the Fat Pack guys highlighting an unannounced insert from the 2017-18 Upper Deck Synergy Hockey release called Color Shift. The cards change to a green-blue hue when under sunlight, otherwise the background and border are an off-white. Now I have only seen two cards change color and they were both the green-blue hue but I am not sure if all of the cards are the same color. It would be neat if they change to team colors.
I was excited to see the Islanders’ captain, John Tavares (Who is now dead to me after spurning the Islanders for Toronto), was included on the list and I was able to find one at a little over $12 shipped.