Shaco Perma-Invisibility (May or may not be only in ARAM)
During my last game of ARAM, around 5-6 minutes in, the enemy Shaco was attacking while invisible. As people should know, he leaves invisibility whenever he casts another spell or attacks anything.
None of us knew what caused it, but around 9-10, Shaco was still stealthed, but visible. He was faded but we were about to see him.
Just thought I'd post about this experience just in case anyone else happened to go through it too.