Caged Masseuse
Goddess Randi uses her slaves for whatever She wants. And She keeps them in cages when they are not in use. In this case, She is in the mood for a foot massage, so She simply snaps Her fingers and the slave knows to immediately crawl out and begin massaging Her Devine feet for as long as She wishes...this is the highlight of its day as it gets to actually touch Goddess Randi's perfect feet until She puts it back in its cage...
(And Goddess has such control over Her minions that She doesn't even need to bother locking their cages...they will just stay in their forever - until they starve to - just because She COMMANDED them to "stay in their cage" until She gives them permission to crawl out!)