Transmute Rock to Stone

This powerful magic enables the spell-caster to turn any amount of nonmagical rock into stone. The casting time does not include the time it takes to determine whether or not the spell has taken effect, which can be considerable. The somatic component for this spell requires that the spell-caster pull his index finger out of his mouth so that his cheek makes a popping sound, then rotate the finger vertically in the air while whistling a low glissando.

Adapted from Dragon Magazine #144