Spamming Mastery
Dearest Rito, I feel that being able to mute the mastery badge emote would be greatly appreciated. Not just the sound, but the animation as well. When enemies (or allies for that matter) spam the mastery emote, it takes up a sizeable portion of the screen. It's not massive, yes. But it is large enough where it can block minions from the field of view. Thus making last hitting more difficult or making ganks less visible. Again, it doesn't do anything too big, but it is large enough where you are unable to see a portion of your screen for a short time. Enough to make the difference in escaping or dying to a gank. And also, the emote is one of the most tilting things in League.
Your's Truly, A Tilted Player