Talk:Liandry's Torment/@comment-129.123.212.214-20130107163246/@comment-5266525-20130110123623

To be more precise, passive damage from items such as Wit's End or Thornmail will not proc spell vamp. Item with actives, however, such as a Hextech Gunblade or Odyn's Veil, do proc spell vamp, as they are considered spells by the game.

Hope that answers the question.