Blizzard has announced that only your highest kill of Sarkareth will give you a chance at the Legendary Evoker Weapon, but it’s very unclear exactly how this works.
It’s unclear exactly what this Blue Post means and I think further clarification is needed as many players are asking the following questions due to the ambiguity of the statement:
If you defeat Heroic first, does this mean that you’re locked out of a Mythic chance?