Mole Knight, Master Excavator

landfall— Whenever a land enters the battlefield under your control, create an x/x red
mole creature token with mountainwalk, where x is the number of lands that entered the battlefield this turn.
excavate—{t}{1}{r}{g}Return target land card from the graveyard to the battlefield tapped.
Whenever mole knight attacks, you may sacrifice x lands, if you do, x attacking creatures each deal damage equal to their power to defending player