As with Smugglers Surprise, Spree plays great with having lots of extra mana lying around
A heuristic I have found useful for identifying cards fundamental to the functioning of a deck is this: does your deck mulligan a high percentage of hands that do not contain this card or this class of cards
Lorcanas promo cards and Enchanted Rares easily rank as the most expensive Lorcana cards so far, but with new cards due to release regularly now that the game is in players hands, its worth knowing exactly what your Lorcana cards are worth as each new set arrives
There's also the surprise inclusion of Moonshaker Cavalry, which for its power feels like the white equivalent of getting Craterhoof Behemoth reprinted in a Commander precon
Curiously, while the majority of sales occurred following the reveal of the Prismari Artistry precon, it didnt spike immediately
Countering chip damage to your Life cards is almost always wrong in the early game