It was still hot in the early evening, one of the
two moons was rising over the mountain range when Ghanima took them out of Tabr and into the the vast plains of the Deep Desert
One of Ghanima's Fedaykin bodyguards went to set the
thumper just south of their position as she went over how to
mount and ride the worm using the
maker hooks, demonstrating slowly how to use them to catch hold of the giant creatures.
The thumper underscored her words with a steady thump/whomp, thump/whomp as they summoned their ride.
[OCD is up!]