Desert's Torture

You take a grain of sand and super heat it to molten standards and place it upon your target. Said target must make a strength save to escape. Upon failure or if not able to do said save, the target takes 1 fire damage every 1 min as the grain of sand burns into the body of the target while causing extreme pain, inducing the frightened condition.

Lasts till it burns all the way through the target from where it was placed or dispelled by the caster. With the frightened duration counting down only after the spell ends.