The wind howled for two days.
The continuous, rasping, susurration of the sands against the rock walls of the canyon became unendurable. Until they slowly disappeared into the background noise, becoming as white as the sound the sand made.
Rhian and Frankie played around the back of the cave, while Minerva kept a close eye outside. Sometimes there were shadows, other than sand blowing past the cave. Anything that could move freely through these, grinding, winds was something to worry about. Something to watch for.
So, she warded the cave. Etched the arcane into the entrance and fed it power.