This change not only happened for the Ravnica: City of Guilds block, but it ended up being a core shift in how R&D approached enemy colors
The Best Creatures In Life Are Free You've done gross damage to your opponents this turn with Rakdos, Lord of Riots on the field giving you a massive colorless mana discount on creature spells this turn
First of the Dragons is great in decks that focus on a big normal monster, like Red Eyes Black Dragon or Blue Eyes White Dragon decks
But XY is past, and in this go-around, we have zero capital letters in the "ex", so, do we have to explain the meaning to all, and find it too complex to understand in the eyes of some who weren't here when XY was, or can we interpret this go-around as a different way to Mega evolve, TCG-style, and remake mega turbo under a different name, and leave the past alone as "different", just like NVI's Eelektrik compared to BLK's Eelektrik
Do note, however, that sets arent identical when making their way from Japan to the West, so well have a separate card list for Phantasmal Flames as soon as details are revealed
The concept art comes from illustrator Vincent Proce, and is just a part of a much bigger piece, which depicts Ulamog in its early tentacle glory