"I owe you a life. You must not die because of me," Therius whispered.
His body quivered slightly as he pressed his right hand against Xion's chest and channeled healing energy.
Even Xion didn't know this, but Therius had the fourth power that he never told anyone about.
He was also a sanomancer. He had the ability to heal. This was actually the first power he acquired and he had been keeping it a secret ever since.
Being a sanomancer, Therius could see when someone got sick. He would also be able to heal that person. He never told anyone this because he didn't want to be forced to heal the people he didn't want to heal.
Sanomancers were blessed with healing power, but they were often bullied and forced to heal people at the expense of losing their own energy, and sometimes their own life. Therius would never let anyone use him like that.