| Ruler | Kingdom | Era |
|---|---|---|
| Mr. Slark | The Federation | 45 |
| Mr. Slark | Relentless | 47 |
| Mr. Slark I | Relentless | 47 |
| Sir Slark The Emotionless | The Federation | 46 |
| Sir Slark The Hatred | 48 | |
| Sir Slark The Illusionist | Black Flag | 48 |
| Sir Slark The Killer | Black Flag | 47 |
| Sir Slark The Subzero | The Federation | 46 |
| Sir Slark Will Kill Music Next Era | Black Flag | 46 |