Kinda a bug/exploit that i found, im sure many are already using this. But aoe that you have to have targeted on the ground you DO NOT have to have line of sight on to do. Comes in handy when defending keeps and such where you can stand behind a rise and destroy the ram's and people using it.
I dont know how long they will keep it this way or if its intended that you need line of sight but its kinda fun to exploit right now.