Due to his proficiency in the skill, Gabby was able to manipulate the very vibrations of the air molecules that were responsible for the transmission of the sound. He was able to match the frequency of the sound waves he emitted with his skills and matched that with the resonance frequency of the water molecules within ice.
As the amplitude of the vibrations continued to increase, the sonic attack resonated with the water molecules and succeeded in breaking them away from the ice. In a matter of seconds the ice that was supposedly stronger than even stone would melt away under his sonic attack.
Dahila felt her attack shatter and liquefy as soon as she released it. She didn't understand how it was that they were able to cancel out her attack so easily but when she found out what was happening through Gabby's mouth, she felt how truly useless her fighting back was. She could hardly get over the natural superiority that Gabby had over her ice magic.
