The deck is full of creatures that have abilities that create treasure tokens, junk tokens or empower your creatures when you attack
The card - which was graded in a Near Mint condition by PSA - was eventually sold after over 50 bids, making it one of the most valuable cards ever featured at a public auction
Unlike Crashing Footfalls however, Primeval Titan has been around for many years already, has seen play in multiple other decks in the past (Scapeshift and Titan Breach) and is still kicking strong as a Tier 1 contender despite multiple bans (Summer Bloom, Field of the Dead) in the past
Halloween itself dates back centuries, with the festival of Allhallowtide believed to be the origin of trick-or-treating, as it was customary to bake soul cakes and give them to "soulers" who traveled door to door, much like winter carolers.
The super-expensive stuff is the really impressive stuff, like Summer Magic, double-printed cards, cards printed on backs, 50/50 miscuts, miscut dual lands, crimped P9, that sort of thing