Torin, Who Dreams of a Spark

Ward {2}
When Torin, Who Dreams of a Spark enters the battlefield, you may look at the top five cards of your library, reveal a planeswalker card from among them, put it into your hand, and put the rest on the bottom of your library in a random order.
{4}, {t}: Add {w}{u}{b}{r}{g}. Spend this mana only to cast planeswalker spells.