I cannot switch off glaives of wisdom (Silencer) on the hero Medusa.
I had Slark's passive, Medusa's Split Shot, Medusa's Ulti, Slark's ulti, and randomed Silencer's Glaives of Wisdom (2nd skill). When I hit creeps with Aghanim's Scepter for Split Shot, and Glaives of Wisdom are on whether I turn them on or off. Ruined the game.