[Taqwus]

Immortals actually seem to respawn in the same turn that they're killed. For instance, once I killed the Master with the Iron Crutch when he (alone) sallied forth from the castle gates and failed to lift my siege, and that very same game turn I killed him again when my troops stormed the castle. If I'd hit him with Earth Attack or Seeking Arrow, perhaps I could have killed him three (or more?) times that turn?