I believe

"We can bring back our family, I will need your help," Marcus let out to Royan. 

The heir gave him his full attention. He was ready to do whatever it takes to help Marcus. Since it had come to his realisation that they needed each other. 

He had vowed to do his part to make their family whole. No matter what it was that was expected of him. Family above all, that was the motto that he had accepted to go by. 

"Adam, he is the only one that can lift the curse. But he has to be willing to and I..."

"You need me to convince him to want to," Royan interrupted Marcus and said. "You need not worry, I give you my word that I will get you the heart of the truest believer," the heir added. 

"It means a lot to me R, thank you," Marcus let out. He embraced the boy from the back and landed a kiss on his head.