This is not unusual for high-chase Sword & Shield sets
The singles boxes were loaded with good cards
Either way, the pattern is clear: At MSRP (5,500) : EV is roughly breakeven to slightly positive excellent for a sealed product At market price (13,800) : EV covers approximately 35-46% of the box cost Understanding the Variance A negative EV against market price is standard for every Pokemon TCG booster box and Shiny Treasure ex actually has one of the better ratios among High Class Packs
However, as more and more Tera Pokmon are released, the effect will more often than not become two-sided, which may also benefit the opposing trainer
Note that Planar Nexus counts as a town now (in all zones), and the everything counter from Omo, Queen of Vesuva adds the town subtype to the land it modifies
This leaves us with a basic plan of casting our creatures on Turns 1 and 2, milling perhaps 12 cards, bouncing everything on Turn 4, replaying our creatures to mill another chunk of cards on Turn 5, bouncing everything again on Turn 6, replaying our creatures for even more milling on Turn 7, and then winning with our big mill finish on Turn 8