Thread:Shurpikov/@comment-25771421-20171228205643/@comment-34121027-20171228223226

Abilities don't trigger THORNS, only autoattacks (including empowered by some abilities).

THORNS reduce healing from all on-hit healing abilities, as stated.

Including, for example, Soul Eater (Nasus), Eternal Hunger (Warwick), Hiten Style (Irelia), Blood Thirst (Aatrox), Determination (Xin Zhao) etc. etc. etc.