Think of it this way: give it three red mana, and you have a 2RRRRR creature that is a 4/3 with First Strike and Haste
A good example would be adding Drapion V [Lost Origin] into your Arceus VSTAR [Brilliant Stars] / Duraludon VMAX [Evolving Skies] deck to have a better matchup against a Mew VMAX [Fusion Strike] deck
They often have different inventory timing than mass retailers
While some conspiracies can be great and can give some massive advantages, the truth is that none of these cards are particularly strong on their own
Most of the time when Yugi attacks with that monster, he announces "Attack, Dark Magician Girl!", followed by "Dark Burning Attack!" When Yugi Summons "Gandora the Dragon of Destruction", a cut-in frame of Yugi briefly appears, and he announces "I'll use this monster to defeat your deck!", followed by "Join me, Gandora the Dragon of Destruction!" If its Summoning animation has not already played this Duel, a cutscene of "Gandora the Dragon of Destruction" being Summoned plays afterwards
At the same time, Roaring Moons first attack, Frenzied Gouging, is out of this world