At this moment, Ace was fully focused on the Heavenly Formation Coin in front of him. With both hands, golden Heavenly Soul Qi was pouring out and completely absorbed by the Heavenly Formation Coin.
Every time the coin absorbed a particular amount of Qi, Ace's hands would start to move into blurry movements, and then a faint dark blue line would appear in the coin.
At this moment, 5% of the coin's surface was filled with those dark blue lines, and their shape was incomprehensive.
When Ace started to carve the heavenly array runes on the Heavenly Formation Coin, he thought it would not be much difficult. But only after starting did he understand just how naïve he had been.
First, he needed to understand that rune, and then he needed to form hundreds of hand signs while focusing his Qi on the coin and shaping it into rune symbols. But even the slightest mistake would ruin everything, and then he had to start again!