User blog comment:B214/Question and Answers 3/@comment-82.178.38.125-20140922032937/@comment-5917000-20140922041533

his dragon feature [attracting strong friends/foes],

and the effect is after getting in contact with, one can get courage and also have effect on their body if direct contact is made with his sekiruitei power too:

1:Rias [it is said that it had changed the characteristics of her POD(something along the lines)]

2:Saji [ i dont know what he got but his hand got changed like black scars like thing probably had some effect on vritra he said some sekiruitei data got transferred and draig commented "it has started" ,means his conscious started to resurrect ]