pokemon entei card ex (JP) 028/190 - Shiny Treasure Darkness Rarity Entei EX - Dark Explorers

It is a Lightning card illustrated by Miki Tanaka

Once you've attacked with it, you can use its [Activate: Main] effect to swap it with an 8-cost Yamato in your trash, giving you even more chances to attack your opponent

What happened with Battle for Zendikar that allowed the set to go unplayed, but still create the most expensive Standard format in years

However, its uniquely strong right now because even non-artifact decks are often packing things like Unlicensed Hearse

Update on February 8, 2025, by Ryan Hay: There have been a few new additions to the grand total of Pokemon sets since this list was first assembled, so we went ahead and added the multiple Scarlet & Violet sets that were missing, as well as a few promo sets that have come out since 2024

Thats more than enough to pay for any variant of this Secret Lair on its own