Cole's Grandfather

The Master of Earth was one of the original Elemental Masters. He is the ancestor of Cole. He was seen in the

Spellbound
The Elemental Master of Earth was a member of the Aliance of the Elemental Masters. He fought alongside the other powerful masters against the snakes during the first Serpentine War. However, Chen manipulated him during a crucial battle in Birchwood Forest to turn against the other masters and ensure victory for the Anacondrai.

Season 4: The Tournament of Elements

 * 40. "Spellbound" (flashback, no lines)