Chapter 136: Alex's Tribulation

He made the Lightning Rod Array first. This array was easy for him now and he only needed a few minutes before he finished. Then, he placed Rank 9 Lightning Materials as the core. He felt pain when using this material. His master said that actually, the array's fuel was Spirit Stones, and that was the common currency in the Upper World. But because this world didn't have any spirit stones, he could only let his pocket burn as he put the material. Well, since these materials wouldn't have much value later in the upper world. He didn't mind that.