Magma Tunnel

By using this spell, a priest can tunnel through solid earth or rock (but not sand or silt) by turning it into flowing magma. A lit torch is applied to the spot of earth the priest wishes to melt. The rock then liquefies and moves out of the way to allow the caster to pass, at a movement rate of 3. The molten rock hardens in its new position, creating a permanent tunnel. Although the caster is protected from the molten rock for the duration of the spell, it takes about 24 hours for the heat to dissipate enough for unprotected creatures to enter. A successful dispel magic spell extinguishes the torch and halts further progress, but has no effect on a tunnel once it has formed.

The material component is a burning torch, which lasts for the duration of the spell.