“Quick, replace the immortal king crystals!” shouted Bai Zhantang.

The attack of the devils rapidly depleted the energy of the immortal king crystals maintaining the formation.

“It’s only been two hours since we last replaced them! It seems that they have increased their attack power.” Bai Shishi’s mother frowned, looking at the devils outside the formation.

“If this continues, the immortal king crystals we have won’t last more than a few days,” said Heaven Master Yun Yang gravely.

Heaven Master Yun Yang and Heaven Master Dong Ming had been promoted to deputy deans of the academy. Essentially, Long Chen had left all the work to the two of them. So, in the past two days, the two of them had gotten quite a few more white hairs.

The main academy had sent over immortal king crystals...