Your opponent also pays the same LP that you pay for that monster during the Standby Phase
You can tell that its one of the reward cards from the championships by the code, which notes its exclusivity
Once per turn, during either player's Battle Phase, you can target all Spellcaster-Type monsters you control, those targets gain 200 ATK for each card in your opponent's hand
Our specialty is Wizard-era cards (Base Set through Neo Destiny) in French and English editions
There are quite a few legends that incidentally produce Treasure tokens, and some that specifically benefit from doing so include: Magda, Brazen Outlaw, Glin, Dwarf Emissary, and Jolene, the Plunder Queen
It's a little one-note, but that note sounds like the trumpet of victory