The void gate item is more detrimental then helpful. It's main use is to set up in a winning lane to push down turrets, but the problem is that the voidlings give 25 gold and are squishy as hell. Meaning, someone with spammable damage (ie. Annie, any adc, etc) can just stand in the portals path for 2.5 minutes and get around 1500 gold, as well as the cs coming through the lane. That means that the items effect is pretty much null.