The Serpent's Beacon is a quest available in The Elder Scrolls Online.
- Rescue Captain Ciranya from the Sea Viper Camp
- Free the three other captive members of Captain Ciranya's patrol.
- Collect the materials needed for a potent fire-bomb.
- Acquire a rune from a Sea Viper to pass through the warded lighthouse entrance.
- Ascend the Lighthouse and burn the beacon.
- Escape from the tower.
- U1: From Update 1, After completing the quest, you will be able to re-enter the lighthouse. 
- U1: Fixed an issue where the rescued Legionnaire's dialogue would not match the situation of the quest. 
A list of the legionaires, living and dead, is as follows:
- Legionary Artaste
- Legionary Mincarione
- Legionary Norfando
- Legionary Pandetuile
- Legionary Tanacar
- Legionary Uulion