'I feel better…', he said to himself.
Yes, the lost vitality that he felt earlier was no more. It felt as if all the life force that he had lost till now, was back. His body was full of energy.
As he touched his chest, he did realize that there was a change in his body but he couldn't say why or how it happened.
'The third crest…'
'Wasn't that the crest of a dragon?'
'Did it do this?'
'Did it do something with my heart?', Rex asked himself.
So, does this mean Rex can use time-reversal as much as he wants?
No, this just meant that his life force had returned to him, but doing it for the next time wouldn't guarantee the returning of the life force.
After all, even a dragon's heart had some life span and its life force was limited too. Everything that is created in nature would die one day. This was true for the dragons and their hearts as well.