Talk:Liandry's Torment/@comment-5172617-20121118023748/@comment-5490997-20121118140804

Spell damage is the kind of stuff Rylai's procs on, afaik at least. That means some on-hit effects (like Teemo's poison darts) will apply this effect, while others won't (I think Kog's Bio-Arcane Barrage doesn't apply it).

It won't proc spell vamp, spell vamp only procs from active abilities/items, this item is passive so it won't proc vamp.

The half duration means it lasts 1,5 seconds and I'm guessing that also means it deals only half the damage. It does mean that, like you say, some (AoE) DoTs will be incredibly strong, especially those who last a while and have some form of CC will hit like a truck.

Personally I think the passive will get nerfed or the DoTs of many champs will get nerfed, because someone like Brand or Cassio or one of the many other DoT based mages are going to get so much out of this item it's not even funny.