This makes your job easier, believe me
The set of creatures affected by the last ability is determined as that ability resolves
There are plenty of plays that can get you in a winning situation with just a few specific Dragons like: Goldspan Dragon Ancient Copper Dragon Hellkit Charger With Goldspan Dragon and an Ancient Copper Dragon out, you can generate tons of Treasure tokens and then make bonus mana off of them
Kewl Tune has seen modest competitive success in the past month, including a 1st place finish at a ~200-player Regional, so Reco and the other monsters of the archetype remain relevant to players Kewl Tune will be getting more support in the May 2026 set Blazing Dominion, so we probably havent seen the peak for this card yet
From storing Pokmon and Magic: The Gathering to trading cards from other games, it handles them all with the same level of care
I cant be sure of the reasons why, but if its in the same category, then it may be OCG only forever too