The Segundo Llave is Spanish for "Second Key". It is in the form of a conquistador's helmet that fell into the hands of the cowgirl gang, the Mystery Gang.
Scooby-Doo! Mystery Incorporated
When musical notes appeared on the Planispheric Disk and the Hex Girls sang them aloud, a light from the disk revealed coordinates that led to Skipper Shelton's Clam Cabin. The owner, Skipper Shelton, told Mystery Incorporated he traded with Handsome Jimmy, then happily gave it to them.
- Scooby-Doo! Mystery Incorporated
- Like the other keys, the frozen scene associates it with a Greek element, in this case water.