Talk:Shyvana/@comment-10022923-20140124200908/@comment-13014780-20140129163022

You kind of answered your own question. The ability details says that activating the proc isn't limited to just Shyvana AND "Flame Breath's mark damage will not apply spell effects ." Therefore, nobody can get spell vamp from it. As for whose penetration is used, I assume it'd be Shyvana's since it's her ability that's being activated.