mystery booster box price history pulled from a curated list spanning over forty Magic sets Wizards of The Coast Magic:

Set: Prismatic Evolutions Decrease: -$130.46 Current Market Price: $1,371.06 Sunbreon spiked from $850 to $1,500 between February 1 and early April, an incredible 80% gain on a card thats just over a year old

Volcanic Emperor weaponizes this well, as it can inflict 500 damage to the opponent whenever they Special Summon when matched against most modern Decks that like to Summon a lot to get to their usual end board, they will be punished heavily for trying to play normally

Its a pain to develop for (many reasons), so this may not always be perfectly up-to-date

Haste.EchoDiscard a card

There are several Pokemon booster packs being sold at retail right now which have been available for months