Let me show you
Even though he had only seen through the mana circulation and necessary amount of mana required by the girl to manifest the dragon head, Jason felt intrigued.
This was mainly because Solaris transmitted to him that it wanted to test doing the same thing the female dragonewt was doing.
As such, he decided to agree to his soulbond's wish and used most of his mana to release into the small black flame that Solaris had manifested on his hand.
The small black flame was transformed into a tiny dragon head, the size of Jason's thumb before it received the first batch of mana, allowing it to grow substantially.
It took much longer to control and form the black flame dragon head than Jason assumed, but that didn't matter because the female dragonewt had to fight with the injuries she had sustained.
Meanwhile, she was also trying to control the secret technique she was using to an extent she had never tested out before!