Ataldis, the Wanderer

+4: Each player draws a card, then each player may put a land card from their hand onto the battlefield.
-4: Target player reveals hand. You may choose a creature from it. Ataldis becomes a copy of that creature but it is indestructible and named Ataldis
0: Until next turn, Ataldis becomes a copy of another target Planeswalker but it's still Ataldis. You may activate one more of his loyalty this turn