Doctor Strange / Dormammu #PD2 2023 Upper Deck Platinum Duos Marvel — Card Value

Which version do you have?

For the absolute cheapest way to own it, grab the Standard version for just $1. The Rainbow version, while only $1 more, offers a slight premium in its specific printing or packaging, though the difference in scarcity is minimal here. If your goal is simply collection completion at the lowest cost, buy Standard. If you prefer the slight visual difference or want the "Rainbow" designation, the marginal extra cost is negligible, so either is fine for casual collecting.