Damon was glad that he was able to help Enigma. He considered her a friend and she was also a friend to Elena, and that was important to him.
"I am here because I was asked to come here, because I am a vampire, and my blood just healed your fiancee," he said. He stepped back from Enigma so that Bruce could see for himself that Enigma was in fact healed from her injuries.
"But since my work here is done, I'll leave you both to... whatever," he said.