Normally, a caster could not conjure that much water, even at his level. But casting them at a fast rate would only spend even more mana.
His spells would certainly consume a large amount of his mana and might cause a great toll on his body. But his magic performance has been taken care of by one of the seven abilities of his newly acquired power.
A few seconds later, the water ball dropped to the sand and made a big splash, scattering the dragon around.
"YOU, PUNY HUMAN!!!"
The dragon, who had fully recovered, got agitated by Raphael and conjured dozens of black magic circles aimed at him. After consuming a significantly greater amount of mana, the black orbs finally manifested and homed in on their targets after a few seconds.
The dragon found it strange but deliberately ignored it since it had absolute confidence in itself. The unwavered dignity of the dragon is still running through its veins.