The Eldrich Noble used his power to create a severe drought as his Fire and Earth elemental powers purged every moisture in the area when he fought Lea.
He knew the true form of Lea's bloodline and knew its weakness. He was one of the Eldrich Nobles that naturally had two elemental affinities often giving them strange and powerful power.
The Fire and Earth that he had could not become Brimstone for he did not have holy. But through Fire, the Earth energy was drained and turned into sand. This special ability that he had was perfect to subdue and kidnap Lea Olethros who was reportedly believed to have mysteriously lived again! The Olethros were beings born of water! And here power would be it's bane!
After days of pursuit and finally locating her, they clashed and he believed that he had managed to gravely weaken Lea.
Lea fled and hid in the marshlands where she could fight the Eldrich Noble and used the moisture in the forest to counter him.