I'm level 70 and still somehow a noob lol. I still don't know how to trigger/time your proc? I still don't know what it looks like when its active. I was told there is a green symbol in the top left corner of your screen, but I still don't see it. Can someone send me a screenshot of what the symbol looks like?
The proc will activate if you have an obelisk that says increases damage by x% for 1 attack.
It looks like a chestplate in green.