The second more common type is the investigation into darker things by the protagonist such as an Antiquarian who reads dark tomes, finds eldritch secrets, explores cyclopean ruins made from non-Euclidian geometry, and more
During your Main Phase: You can place 1 face-up "D/D" Pendulum Monster from your Extra Deck in your Pendulum Zone
Keep in mind that this fairly simple strategy with Cyrus does a gross of 280 DMG, KOing any Pokmon in the meta, even Megas
Some will have some really cool shit, some will have nothing xD (I literally found a Rayqauza Poncho Box in a store) They can be crazy
It's not classified as a legendary Pokmon but rather as a mythical one, which means it is typically distributed through special events rather than being found naturally in-game
As with most of these types of games, the shine does wear off after a bit, but its a pretty solid game