The next attack had been their undoing. The unicorns routed their attack by turning the very earth against the spell disruptors, pulling jagged rocks out of the ground to trip and impale even as they flung boulders down on the stallions, and no flag of surrender would stop the slaughter. “Because it also blocks beneficial spells,” Celestia said simply. “We do still have some similar armor, but it's only used for special cases.