User blog comment:Heartlessmushroom/Zhul'ha, Emissary of the Void/@comment-220.255.2.56-20121105111838

Because its global, the presence it makes threatens everyone and they cant go on a offensive. I know karthus is similar but karthus does not teleport there hence there isnt much of an after threat. This however, allows you to help ur allies and even turn the tide and win the lane. I'd say increase the channel time as a start, to about 3 seconds(Shen's ult channeling time).