- Slifer the Executive Producer is one of the three Egyptian God Cards, created by Pegasus. Shortly after their creation, he gave them to Ishizu Ishtar for protection, before it was stolen by her brother Marik.
It was used by Marik's mind-slave Mime Steve during a duel against Yami, but thanks to some manipulation of the rules and a glaring flaw in the Duel Monsters rule book, Yami defeated Mime Steve and took Slifer.
The next time it was used was during the duel between Yami Yugi and Yami Bakura/Florence. Yami used Slifer to simultaneously defeat and hospitalise Bakura.
- The name is a reference to the fact that the original Slifer the Sky Dragon was named after Roger Slifer, one of the 4Kids producers of the first season of Yu-Gi-Oh!