Gameplay Bug, Free Aspect of the Serpent Stacks
I was playing ARAM as Cassiopeia and was standing at base as the game just started when I noticed my Aspect of the Serpent stacks were increasing. I clearly wasn't poisoning anyone. I looked at my team and saw we had a Singed and Teemo. I watched and every autoattack by Teemo (toxic shot) gave me some stacks, and anything in Singed's poison trail gave me stacks also. While I enjoyed the free stacks, I'm sure the opposing team didn't like that advantage. The passive wording says I get stacks when only I poison people.