The lightning leaped through the atmosphere in less than a split second as the 'fist' of the humanoid thunder emitted light that was as bright as the sun in the narrow cave of the mountain. The magic energy in the surroundings seems to be activated by that strike. Instantly, everything went chaotic, and a small anti-magic area is formed.
Without any special mean, none of the magic power within this range would be able to react with any other external element.