Lastly, there are cards specifically built around this mechanic, like Thieving Varmint or Gonti, Canny Acquisitor, that easily let you cast spells you dont own
However, the biggest appeal to me is the wrath protection: Wilhelt ensures you still have a board post-Wrath of God, negating one of the biggest weaknesses of many typal decks
I could go on for a while about why I think the planeswalkers have to have built on protection critique is a little silly, but hey, maybe another day
It also flickers creatures when you cast your second spell, which we love to see
Its very bad if you dont have creatures, as paying 6 mana for a double Naturalize is not optimal, but on any regular board, youll either power up a strong attack, refill your hand, or both
This creates a nice half-step between the banned list and showing up everywhere