Dark souls

When Land of Dark Souls enters as long as you dont tap it the first turn it was summoned, next turn you can exile a card and you get mana equal to the type and how big was the mana cost. {T}: Add one mana of any color. {3}{T}: You can add any equipment from your library to the hand. If you dont have any equipment card in your hand this land doesnt get tapped and cost for this ability to activate is {2} less.