Check out my previous examinations: Revisiting Commander 2011, Revisiting Commander 2013, Revisiting Commander 2014, Revisiting Commander 2015, and Revisiting Commander 2016
Since "any number" includes zero, you don't have to choose any permanents at all, and you don't have to choose any players at all
At time of writing, the card seems to be getting legitimate bids in the $350,000 range, but that's expected to increase as the rarity of the card makes it a must-own for the few people with the money and inclination to acquire it
Sure, its not as good as Swiftfoot Boots giving my best guy hexproof, but it still can regenerate from most targeted removal, and unlike the hexproof, it can also regenerate from damage in combat and some sweeping removal, such as Magmaquake and Day of Judgment