Monumental Henge is a rare Land card from Modern Horizons 3 (MH3), collector number 354. Current market price: $1.37 (foil $3.13), TCGplayer market prices via Scryfall.
This land enters tapped unless you control a Plains. {T}: Add {W}. {2}{W}{W}, {T}: Look at the top five cards of your library. You may reveal a historic card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. (Artifacts, legendaries, and Sagas are historic.)