List of Laran weapons:
Clingfire - liquid substance used in catapults, by the authors description it could be some kind of strong acid like Hydrofluoric acid.
Bonewater Dust - substance by which every living thing die slowly death, probably due some kind or radioactive polution as symptoms are very similar to Acute Radiation Syndrom.
Lungrot Plague Spores
The usage of laran weapons was banned along with Towers particapation in wars by the compact of the Varsil the Good.