shiny treasure booster box (sv4a) [JP] with a focus on Paldean Pokémon and fan favourites such as Mew Korean Shiny Treasure Booster Box

In addition, whenever a Spell or Trap card or Monster Effect is activated, Toadally Awesome allowed you to Tribute an Aqua Monster from the hand or field to negate and destroy it

The upside could be huge

You can only chose a given option once a turn, but it's not restricted to your turn, so a timely Auroral Procession or Unbury can create a surprise blocker or extra card advantage

Including the 3 energy required for the attack, if the player puts merely 2 Fairy energies on each of their 5 benched Pokemon and then mega-evolves Gardevoir, they can do close to 400 damage with no negative secondary effects

For each nonland card revealed this way, you create a tapped Treasure token

Looking to pick up some Lorcana of your own