As of the release of Innistrad: Crimson Vow, there are 261 individual Planeswalker cards
Bears and bear-adjacent people have been the butt of many jokes, whether it be a subplot in an episode of Ashes to Ashes that had a cop go undercover in a bear club, or Glee literally putting an actual bear on its stocky, gay character's bed
Repeated resurrection of huge threats like Avacyn, Angel of Hope, Kokusho, the Evening Star, or Vorinclex, Voice of Hunger for a mere 3 mana is simply more than many pods can bear
With just one tap ability you gained knowledge of what all your opponent's next play might be, added up to three green mana, gained up to three life, and drew one card.
While ultimately getting your deck costs a little money, I honestly enjoy completing card collections very much, and am admittedly very good at it now