This is the simple, yet effective, principle behind 5-Color Legends
Trainer cards saw stronger effects, and competitive decks got faster and riskier
That said, The One Ring is held back by a few factors, like its relatively high mana cost, so it's not always a straightforward addition to fast-paced Standard, Modern or Legacy decks where every bit of mana counts
A Yavimaya Hollow would also have been great in this deck, but with a sticker price of near $20 these days, I couldnt suggest it and keep anywhere near your budget rules
To be honest, Im ready now because the lack of new content after the initial grind is dull, but I appreciate the time to complete my Pokedex and hunt the alt arts for Zapdos ex and Gengar ex