A classic way to combine "Dragunity" monsters with some generic options is to Synchro Summon "Dragunity Knight - Gae Dearg", to use its effect to search and then discard "Mist Valley Baby Roc", which special summon itself directly after being discarded, enabling the Synchro Summon of a relatively generic level 8 monster like the aforementioned ones
This can make a useful ramp option for sacrifice or artifact decks
Each half of the expansion has its own personality, with Black Bolt centered around Zekrom, Kyurem, and Genesect, while White Flare features Reshiram, Keldeo, and Hydreigon
It is each players own responsibility to keep track of when their own triggers are being met and keep their board state accurately updated based on that
However, there are some things you need to keep in mind if youre going to use this method