The answer is flexibility
Making it impossible for your creatures to be targeted by your enemies, the Hexproof keyword provides protection, not just against instants and sorceries that would kill your minions, but against any and all types of interaction
Curation is exhausting work, a labor that has increasingly begun to remind him of his old life before the city rose and the age of knights, lords, and monsters fell behind
Likewise, Strip Mine provides a valuable service to the deck but could be replaced with a cheaper land-hate option like Ghost Quarter
Well, the events of the story I wrote kind of blew his coverand, just as fearedsoon after, he got several visits from extra-planar entities looking for planeswalkers to recruit for their cause