Date- 18 April 2321
Time- 05:44
Location- Card World, Southern Region, Blossom District, Sky Blossom City, TSR Guild Headquarters, Blood Rock Cave Dungeon
The Devil was too strong for the Dragon to defeat and the Dragon was too fast for the Devil to capture. So, when the Elder Anesthesia Dragon and the Deviant Devil finally meet each other after a few millenniums they had their plans to take down each other. Which was why did not immediately start fight rather bid their time for their traps for the other to complete.
While the Dragon was locating the celestial blood-rule slave, the Devil was using its blood-rule domain to slowly strip away the Dragon's innate ability using the blood-rule meaning, Blood Regression.