This set is appropriately named the Dragon Discovery promotion, and Dragon-type fans will want to get their hands on these cards, but tracking them down could prove problematic as they appear in Happy Meals
The main differences are Psychomancer looks for non-token artifacts, and only targets one opponent
Although new cards that help make older cards relevant again, such as the Transcendosaurus archetype, appear occasionally, these cards are unlikely to become relevant again
I assumed that since Dragon Ruler and Spellbook were so expensive and the set "Lord of the Tachyon Galaxy" had just come out, the majority of players were going to play counters, like me
Unlike typical prize cards, this event-exclusive promo was never intended for mass distribution, making it one of the rarest Yugioh cards in existence