Abel was a man of his word. He began to apply his power of the will to the base of a hundred skills. Since there wasn't a normal method to initiate a hundred skills, under Abel's power of will, he felt that he was able to continue to forge. Abel then lifted the 100 pounds hammer higher and forged layer on top of layer as he threw the base into the furnace again and again.
101 skills, 102 skills, 103 skills….. 120 skills.
When Abel had reached 120 skills, he realized this base was no longer viable and he could no longer strike it with his old method. The structure was much more compact than those normal base of hundred skills. As the stiffness was much higher than he had expected, Abel decided to name this base as the base of 120 skills.
From the process of base to shield forming, all Abel had to do was tap slowly. When a typical knight shield was forged by Abel, he always did a cut on the handle which allowed him to place a gem inside.