The original location definitely had a more vintage feel to it which was more nostalgic
It uses the rules and cards that were legal during the summer of 2005, which allows all cards through The Lost Millennium to be used
Card Type / HP / Stage: Water / 330 / VMAX
In the unusual case where Copy Catchers becomes a copy of something else while its triggered ability is on the stack but before it resolves, the token will enter the battlefield as a copy of whatever Copy Catchers is copying
Obviously just making new powerful cards regardless of that is something we do as well, but being a trading card game, it's always continuing from what came before. Sometimes, players surprise the card designers with how they use a certain card or deck, despite the dozens of hours spent testing and balancing them
Given that Duskmourn introduced a bunch of enchantment nightmares, including a couple that didnt quite make the list, you could look to enchantress synergies like Sythis, Harvest's Hand and Inquisitive Glimmer for a more concentrated way to use your nightmares