is the "Bunshin" skill from Ninja, as of 5.1 it now grants 5 stacks so your next 5 weaponskill executed Will have the "bunshin" effect, people commented before to change bw into this, doesnt change that you Will do 5 gcd of bw but ping, lag spikes, pressing it too soon( currently has a very tigh window to correctly use it), etc... will not make you lose the fith bw gcd.