The name refers to the near-$4000 pricetag to originally build the deck, though it's a happy coincidence that the deck also features Smokestack
The last ability of Liliana's Talent will trigger whenever a creature deals any damage to the enchanted planeswalker, not just combat damage
It does a good impression of FOW in formats where that card isn't legal, and it sits side-by-side with the all-timer free counterspell in formats where both co-exist
The flavour text is particularly fun for this one, taking the form of the report of a confused soldier being creeped out by how consistent the eyewitness accounts are for the strange descriptions of the Mistfolk
Token generation is another piece of the puzzle
Inevitably, if the bulk of the Stasis Prison deck is dedicated to the Stasis lock, it is conceivable that the Stasis deck could be engineered to deck your opponent