You didn't need to draw it, simply due to the fact that unless you are so retarded that you slip on your own drool on a regular basis the concept they put forward is not hard to grasp.
Also the reason you are in an Alternate timeline is pretty easy to understand if you have paid ANY attention to ANY lore surrounding the Bronze Dragons.
There are multiple alternate timelines running all the time, this is no different to Thrall taking the Dragon Soul from Well of Eternity in a different timeline and bringing it to fight Deathwing.
It is just on a greater scale since we are not just grabbing one thing, we are camping out in the alternate timeline to STOP Garrosh from raising an army to bring across to our timeline.