Mordekaiser W (Harvesters Of Sorrow) targetting Bug
Watch randombotIane's League of Legends video: wtf is this shit? - Plays.tv
Mordekaiser's W (Harvesters Of Sorrow)** ALWAYS** targets the closest ally, not the one you are targetting. The tooltip however says "Target an ally, linking them to Mordekaiser..."
EDIT: Just got feedback on reddit, saying this only happens in ARAM
EDIT2: FIXED!!! Thanks Riot!