A tough enemy in Kingdom Rush: Frontiers.
Relentless elite warriors with a reputation for invincibility.
- Use mages as they have armor.
- Even upgraded soldiers will die easily to them, so use your ranged towers.
- Rain of fire seems to kill them in one use with the second upgrade.
- The Fallen spawned afterwards is much easier to kill, so don't worry.
Immortals might be inspired of Immortals from Movie 300 and also Persian soilders wich the Herodotus gaved the name for these Persian soilders