The Best Swimming Hole

{1}, {t}: Add {2}{g/u}. Choose an opponent that was
not chosen last turn. They gain control of The
Best Swimming Hole, and they untap it.
At the beginning of your upkeep, you gain 2 life.
The Best Swimming Hole cannot be sacrificed.
"Here it is! Isn't this place great? I just love it here."
-presumably many people