Kurgal’s Leash and Unholy Might

Apologies in advance if this has already been answered, I’ve just yet to dig it up.

Let’s say I have 10 skeletal snipers summoned. If I socket Kurgals Leash into my snipers, and then command Gas Arrow, do all of my snipers receive the Unholy Might buff or just the single sniper out of the group that shot the gas arrow.