Talk:Rammus/@comment-31876693-20170902130353/@comment-3148314-20170902192016

Neither. The auto attack that procs it will apply lifesteal, but without the bonus magic damage; and since it's not an ability, it won't proc spell vamp either.

However, it will proc Gunblade's passive, which heals of all damage dealt, i.e. in this case the combined damage of the auto attack and the bonus damage.