Josh, the Patch Notes

0: This planeswalker can be your commander. Passive -- This planeswalker's loyalty is equal to your life total and vice versa.
-3: Create a */* artifact creature Golem. Its power and toughness are equal to the number of times you've activated this loyalty ability this game.
-5: Until your next turn, the next time you cast an instant or sorcery spell, target land you control becomes a 3/3 Chasm Skulker, it's still a land.