He was doing his best, and once he realized the fire wasn't working as well as he had hoped, and the pits weren't shattering thighs, he switched to growing the grass up into the zombies. He could feel a warning headache forming, and would be paying for his massive power surges later, but right now, he had to finish this before TOO many of the soldiers went down. He only put power to grow up to a bit past knee level, as the LAST thing he wanted was to grow it higher and... he cut off the rest of the thought, lest the gods start paying attention and decide that was a good idea to throw at him for a giggle.