Confounding Conundrum is a rare Enchantment card from Zendikar Rising Promos (PZNR), collector number 53p. Current market price: $0.44 (foil $0.74), TCGplayer market prices via Scryfall.
When this enchantment enters, draw a card. Whenever a land an opponent controls enters, if that player had another land enter the battlefield under their control this turn, they return a land they control to its owner's hand.