ROD

Found In Sarda's Cave
You'll have to visit Sarda after fighting the VAMPIRE in the Earth Cave to get the ROD. It unlocks the path to B4 of that dungeon, allowing you to reach LICH and restore the ORB of Earth.
Compare ROD to other Items
Treasures: Containing ROD – 1 shown
Map
The specifics of where this treasure can be found
Notes
Sarda's Cave Speak to Sarda
KEY FLOATER

Related

The ROD

The ORB of Earth
Page 4
Give the RUBY to the Titan to reach Sarda's Cave and obtain the ROD allowing you to reach Earth Cave B4.

The Fiend of Earth

The ORB of Earth
Page 5
Return to the Earth Cave and plumb its deepest depths to destroy LICH and restore light to the ORB of Earth.

Earth Rod

Rod imbued with the spirits of the earth.
Found In Sage's Cave
You'll have to visit Sadda after fighting the Vampire in Terra Cavern to get the Earth Rod. All it does is open B4 of that dungeon, allowing you to reach Lich and restore the Crystal of Earth. Key Item or glorified quest flag? You decide!