Curse of the Forsaken Lake

At the beginning of each player's upkeep, that player puts the top three cards of his or her library into his or her graveyard, whenever one or more creature cards are put into a graveyard this way, its controller sacrifices all non-spirit creatures he or she controls then creates a token that is a copy of a creature in his or her graveyard except its a X/X black spirit in addition to its other colors and types where X is the number of creatures in its owner's graveyard.