User blog comment:Theflash458/The Flash's season 1 and 2 review/@comment-7890302-20160817004218/@comment-28428105-20160817042810

It was never intended by Mercury Labs, It was just that Zoom knew what he was doing and was smart to work out what the magnetar could be used at. Also, Barry stopped Zoom by summoning up a time remnant. Said time remnant sacrificed his life by counteracting the effect the magnetar had on the multiverse by creating his own pulse.