Challenger +2 grants Captain Hook, Forceful Duelist an extra two points of strength when he challenges opposing characters, making his effective strength three when taking the fight to your opponent
When a creature is put into an opponents graveyard from the battlefield, if this card is in your graveyard, exile this card
This will, of course, have you building a deck with all the best Angels, Demons, and Dragons you can get your hands on cards like: Master of Cruelties Avacyn, Angel of Hope Terror of the Peaks 1 Giada, Font Of Hope Ramp And Power Easily the most consistent and powerful Angel commander you can run is the savior of New Capenna, Giada, Font of Hope
The glaring difference is that planeswalkers are easier to attack and it is a bit more elementary to enable some chip shots on an opponent and work them towards a lower life total, but once again thats only a piece of the puzzle
For older, perhaps out of print boxes, you then need to look at sources such as eBay sellers or people in the Pokmon community