Njord, the Sea-Bringer

As long as you have 6 or less lands, Njord, the Sea-Bringer isn't a creature.
At the beginning of your end step you may tap any number of creatures you control, if you do, target player puts the top X cards of their library into their graveyard, and you draw X cards, where X is the amount of creatures tapped this way. If X is 10 or more, tapped creatures you control gain hexproof unt