Gravis had been smelting for a couple of days now, trying out different materials, different amounts of Spirit, and different amounts of concentration. However, he had to take breaks now and then. Keeping the form of the weapon inside his imagination while doing the calculations was very demanding on his concentration.
In over 90% of cases, Gravis pulled the ores apart too soon, breaking them in the process. 5% were too high, while the remaining 5% were just right. After seeing the results on different materials, Gravis noticed that he nearly always pulled the material apart too soon.
After a couple of days of smelting, he went back to trying only one material. This material had a rank at the Initial Unity Realm. A material like this should be just right for him. After all, he was at the Initial Stage of the Unity Realm. Of course, he went back to this material because he found out the answer.