As the astral construct charged the machine, a ray of black energy leapt out and struck the creature, causing no visible effects.  Similarly, the Astral Construct's attack didn't affect the spell turret in the slightest, leaving it unscathed.  Meanwhile, out of the fog cloud, beams of black energy leapt out, accurate as ever.<br/><br/>(Attack roll against Mark, 27 touch; attack roll against Garrett, 14 touch)<br/><br/>As the group began to confront the machinem it made a grinding noise and slowly started sinking into a lower level of the facility, sending up great hunks of stone as it burrowed.