Isle of Elsi Adventures #6 collects the first 28 pages of "R.J. Jr. in The Underground Underground" by Alec Longstreth.
When Draziw the Wizard casts a spell incorrectly in Nogard the Dragon's cave, hundreds of stalagmites and stalactites come to life! This mishap leads Rex and Sally into an adventure deep underground where they discover a clan of dwarves. Mysteries abound the first installment of this action-packed story!
See a video preview of this comic book here: https://youtu.be/7q_6voNig9I