Actually it was very fast, after only 10 minutes he had already engraved the Rune of disguise and the Rune of limitation and after 2 more high grade Talismans, filled with his own energy, and 7 more minutes he engraved the Rune of revelation on this magic bracelet.
As Art was focusing all his attention on the last Rune which happen to be the most powerful one, he used 4 Talismans at once and after 30 minutes and 2 more Talismans he finally succeeded engraving the Rune of universal language.
Just as Art was done Steven joined them first and after a few more minutes Adrian was done as well with creating his second superior mark of the day.
They now both had the numbers required of superior marks to be able to evolve their energy cores and the only thing left to do was to absorb the energy crystals that they already had at their disposal as Jonas gave them to them already for when they would be ready to use them.