I've seen four men huddled around their car talking about how much they could make by selling the trunk of cards they bought during a morning hitting different stores
The Marnie card is expected to, as with the Marnies in the Sword & Shield base set, be major chase cards
If you're playing Hearthstone and know that the new meta is dominated by gurgling Murlocs, you'd normally have no option but to buy a dozen random packs and hope you draw what you need, putting a quite a lot of money into ActiBlizz's pocket along the way (and even then you're not guaranteed that you'll get the cards you want, potentially prompting further purchases)
Luckily, its other Move, Psychic Select, allows you to reuse cards from the discard pile by putting them back into your hand
Sceptre of Eternal Glory is great even without an infinite combo, accelerating out late-game strategies a few turns earlier in mono-colored decks