Enveloped by the Eternal Night, the vast earth was parceled out to different 'Old Kings' based on their ranks.
The symbol of ownership was provided by a 'Land Deed'.
Of course, a 'Land Deed' was not just a symbolic certificate of land usage rights, but rather a clear statement that the region was directly under the 'protection of the Old King'.
It was also symbolic of identity; the holder or spokesperson of the Land Deed would be referred to as the "Lord".
Because of this, Han Dong was being cordially invited by the Scarlet Count due to his status as a Lord.
The "Red banquet" was a feast held by the Blood God, with the fundamental purpose of gathering individuals with a strong affinity for blood from around the world and inviting them to join the Blood God's big family as part of the Nobility.
For this Red banquet, the Mad Laughing Count - Bach Darren was merely the person in charge of the feast, entrusted with inviting as many different parties to participate as possible.