The Magonians were supposed to sail the skies in storm clouds; they would then pay Frankish tempestarii to summon up storms over farmlands, during which the Magonians could swoop down and steal the corn from the fields.
According to legend, the Magonians were meant to glide through storm clouds; they hired Frankish tempestarii to create storms over farmlands, allowing them to descend and plunder the cornfields.