Will, the Octomoose

Will can't attack unless you and defending player control an Island, Swamp, or Forest.
When Will attacks, tap target creature defending
player controls, that creature doesn't untap
during its controller's untap step for as long as
you control Will.
Lands you control that are Islands, Swamps, or Forests, have "{t}: Draw a card for each tapped creature target opponent controls.".