Leviathan, the Envious

When Leviathan, enters the battlefield, if an opponent controls as many or more nonland permanents than you, that opponent sacrifices nonland permanents until they control fewer than you.
Once per turn, whenever an opponent casts a nonland permanent spell you may pay mana equal to that spell’s mana cost to counter it.
At the end of an opponent's turn, if they control more nonland permanents than you, you may destroy up to three of their nonland permanents. If they control at least ten more nonland per