Secondary / Boss / Either Recorded Logs or In-Game Appearance with voice modifier.

The Dealer is a paranormal computer pop-up that, upon agreeing, transports unlucky internet searchers into a realm where they gamble their life under his control. Rabidly mad and with an obsession with gambling without a care in the world, it sees itself as “God” in its own psychic realm. It has claimed countless victims in the Real World, and the unlucky few have been psychologically scared by it. However, one of the player characters wasn’t affected by it, and for it, it searches to someday encounter him and put his life on the line once again and see who really is the luckiest one.

For casting, I'll take in mind the creativity you use when voicing this character, including voice effects.