The last skill was useful for assassins and thieves classes. He stored it for now. In the future, he would have many teammates who would benefit from it.
After he learned these three skills he felt himself stronger. If his luck was good he would get one or more skill from the other monster or the treasure chest.
The last unidentified thing he knew its use at once. It was a black gold key. That was used to open that treasure chest. When he obtained that key he knew the grade of this treasure chest.
It was a dark gold grade. The highest treasure chest he ever opened was a fine gold treasure chest in his precious life. He felt excited about this treasure chest. There must be a lot of valuables in it.
He didn't go immediately to the chest, but he checked the drops of the Higher Elite monster. Although it was much weaker in level, grade and class than the mini-boss monster, but it dropped around 30 things.
