When the purple robed man just came up, the blue lightning pike was already released. Previously, his opponent used fist sized lightning balls, but this time, there were heaven covering lightning needles. Each one was a few inches long and in the middle of the needle was a lightning ball that was larger than a fist.
When these lightning needles and lightning balls fused together, the audience realised that they formed an eight trigram formation.
Ye Mo didn't watch the grey robed immortal emperor. He wasn't scared of lightning element attacks. He watched the purple robed man. He probably would fight the man, so he would need to know his means.
Although Ye Mo didn't care about the lightning formation, the purple robed man didn't have Ye Mo's capability of devouring lightning. Before the lightning formation formed, he released a huge drum.