Overall, Water attribute decks have been phenomenal strategies over the years, and it is unlikely that they will ever truly fade out of the format
A Swamp is significantly different than creatures, but sometimes just as plentiful, and this makes Lake, a super-charged Phyrexian Tower
Every card has a premium (commonly called "foil") equivalent
Jolteon 135/165 Loading
But any time we showed that to our internal playtesters, or other people, just to gauge how were doing as we made these, they bounced off that really hard
Some quick table napkin math will show you that this drop's not worth it at all from a financial perspective , assuming it's priced the same way most Secret Lairs are priced ($30-40 for nonfoil copies, $40-50 for foils, with this particular drop coming in rainbow foil)