The Pikachu ex 028/131 Double Rare has been popular with both players and collectors, while the Pikachu ex 179/131 Hyper Rare features an all-gold foil treatment that makes it one of the most visually striking Pikachu cards in the modern era
This is allowed because technically after you destroy the Battle, you transform it, exile it, and then have the option to cast it without paying its mana cost
In the right spellslinger deck, this enchantment becomes a win condition all on its own
If that spell is Vial Smasher itself, Vial Smasher's ability can't trigger
Because getting LC cards graded out as PSA 10s is so difficult, only 12 total PSA 10 reverse holo Legendary Collection Gengars exist making this card even more spectacular and making the $400k price tag somewhat more feasible
Treasure Map / Treasure Cove Shame that Treasure Map isnt an X-spell, since X marks the spot