DotA 6.67c Windrunner Bug - Permanent Focus Fire

Title says all. Here comes another exploit found in the Dota 6.67c just short after the Roshan Bug. This time you can have permanent Windrunner's ultimate (Focus Fire) with no Damage Reduction. It's kinda game breaking bug and may cause rage quit of your opponents but you may try it for fun :)How to abuse Alleria - Windrunner Focus Fire bug:- Requirements:• Windrunner, Level 6 with Focus Fire.•