Detection Tower is a rare Land card from Core Set 2019 Promos (PM19), collector number 249s. Current market price: — (foil $7.01), TCGplayer market prices via Scryfall.
{T}: Add {C}. {1}, {T}: Until end of turn, your opponents and creatures your opponents control with hexproof can be the targets of spells and abilities you control as though they didn't have hexproof.