Imagine if you were the last Shadowhunter left on earth, imagine if all your family and friends were dead, imagine if there were no one left who even believed in what you were. Imagine if you were on the earth in a billion, billion years, after the sun had scorched away all the life, and you were crying out from inside yourself for just one single living creature to still draw breath alongside you, but there was nothing, only rivers of fire and ashes. Imagine being that lonely. and then imagine there was only one way to fix it. Then imagine what you would do to make that thing happen.