Moving on

At first, Hineko and Price were ready to draw their weapons, thinking Little Phoenix's sister had created the hand. But fortunately, they quickly noticed that Shingi had his hand in the same motion, meaning he was the one controlling it.

As for Shingi being able to learn a Master Grade Spell, so quickly was expected as his Mana Control over the Earth Element had been more than enough for that Spell. ROC'S HAND was a spell made by an Archmage named Roc, a master of the Earth Element, and had created many of the Master Grade ones of Earth Element.

Ameanum had studied spells like that even if he couldn't use them, but it was good to have that knowledge to fight people who knew them. Also, many details were in the notes that White Biscuit had given him, making it easier to learn Spells like that.