User blog comment:Just one lol player/TONS OF CONCEPT ITEMS/@comment-1330314-20131230161856/@comment-1330314-20140101093625

Again, the duration is irrelevant because it's an effect you don't want to have in the game, due to it being super unhealthy. Any ability that specifically prevents the use of an ultimate is a terrible idea. You also don't want a silence on an item, otherwise champions with inbuilt silences could simply stack up both effects and silence an opponent for way too long an amount of time.