Earth Glide

This spell grants up to ten willing creatures you can see within range the ability to burrow through nonmagical, unworked earth and stone for the duration. Each target gains a burrowing speed equal to half its walking speed. While burrowing, an affected target doesn't disturb the material through which it moves. 

If the duration ends with an affected target within unworked earth or stone, the spell carries the target to the surface at a rate of 60 feet per round.