Special Mortal Soul

Date- 5 April 2321

Time- 04:13

Location- Southern Region, Blossom district, Sky Blossom City, Outskirts 

"I can smell somebody I know on you, who is it? Who betrayed me?" the Jet-black monster worm asked. 

"Shut up, Belphegor," I ordered the devil. 

Turns out that as long as I use the devil's true name it cannot choose to ignore my commands.

Commands? 

At its core, the devil merchant card was a demonic summons card, like in any other summons card, the summons follow the command of the summoner without a doubt. Similarly, the devil merchant summoned using this demonic summons card has to follow the orders of its summoner. But the rules of using this card were different.