Distorter of Minds

At the beginning of each opponents upkeep, that player reveals cards from the to top their library until they reveal X land cards, then puts those cards into their graveyard.
At the beginning of each end step, put X creature cards in graveyards onto the battlefield under your control, sacrifice them at the beginning of the next end step. You may cast any combination of X instant and/or sorcery cards from graveyards.