Manji, Forests Protector

+3: When Manji, Forests Protector enters the battlefield, you gain 6 life.
-5: Your opponent shows their hand. If a Planeswalker is in it, you may discard it. If a Planeswalker is not in their hand, discard up to 3 creatures
-11: Your opponent loses 10 life and you may discard 7 of their creatures