Lastly, "Darklord Zerato" is not related to either group, being a member of the "Zera" series instead
Like most Magic: The Gathering cards, the value of Drag Under depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Foundations Jumpstart)
Incandescent Arcana includes Braixen CHR, Milotic CHR, Jynx CHR, Gardevoir CHR, Smeargle CHR, Altaria CHR, Serperior V and VStar, Reshiram V, Alolan Vulpix V and VStar, Mawhile V and VStar, Magearna V, Ho-oh V, Serena, Furisode Girl, Wallace, Energy Switch, V Guard Energy and Radiant cards for Tsareena, Alakazam and Jirachi
A card's value at release, three months later, and three years later can be wildly different