Temple of the Dragon Queen is a uncommon Land card from Tarkir: Dragonstorm Commander (TDC), collector number 104. Current market price: $0.37, TCGplayer market prices via Scryfall.
As this land enters, you may reveal a Dragon card from your hand. This land enters tapped unless you revealed a Dragon card this way or you control a Dragon. As this land enters, choose a color. {T}: Add one mana of the chosen color.