This is my first fan fiction and I'm really excited about it my really excited that my first story will be about The Mortal Instruments. Disclaimer: I don't own any of the characters they belong to Cassandra Clare the amazing author behind this series.

"It's astounding how much she looks like Cecy." Tessa exclaimed. She watched as Magnus once again placed another damp cloth on the girl's forehead.

"Fortunately the Lightwoods still carry the Herondale genes it would have been a shame to lose the blue eyes and raven hair." Magnus smirked.

It was true, watching Isabelle Lightwood; Tessa couldn't help but be transported back to a time long ago. A time where she had watched as Will had taught his younger sister to train until she became a fierce warrior herself.

Will. Not a single day went by without her remembering her beloved husband. It's been seventy years but her heart still ached for her love, she still wore the pearl bracelet he had given her for their 30th wedding anniversary. Being immortal Tessa had outlived all her family and friends making her heart ache even more intense.

Tessa was completely lost in thought she hadn't heard what Magnus had been saying until he placed a hand on her shoulder. His cat eyes had once freighted her, now it was something she appreciated and always looked forward to seeing whenever she came for a visit. When she looked into his eyes it held understanding; of course he would understand Magnus has lived many centuries having to bury the people he loved. A never ending cycle that would haunt their lives forever.

"Does it still hurt?" he asked. She wanted to lie to him and tell him that the pain had dulled but knew he would see right through her. So Tessa settled on the truth. "Every single day I find myself wishing Will was here, wishing to tell him of my day and the new things I have seen. Wishing to see the mischief in his blue eyes, to see him smile or see him come up with an impromptu poem. But every day I must remind myself that Will is gone and that he won't come back and everyday it hurts like the first time."

Tears were trickling down Tessa's cheeks and Magnus couldn't help but let his own emotions come to the surface. Even though his memory had dulled he could still remember the strong willed shadowhunter that had turned up at his door late at night.

William Herondale was someone Magnus could never forget for he had shown him that even though he was a downworlder he was still human. Will had spoken to Magnus as if he was any other person; he had touched Magnus in a way that till this day he did not quite understand. He had felt a need to see Will happy for he felt responsible for the young shadowhunter, and he had, Magnus had seen him marry the girl he loved, had seen him become a father a grandfather and then ultimately had heard of his death. Magnus had not been able to go and see Will one last time, he had made up an excuse about him being stuck in Peru. But even he knew to admit that his excuse had no merit for he had been in London at the time, he had heard of Will and that his time was near he had raced quickly to London to give his farewell. Magnus had felt for the first time that time actually mattered, something he had long forgotten.

Arriving in London, Magnus was ready to go to the Herondale compound but something happened, he found himself unwilling to go and say a final goodbye to his shadowhunter friend. Being immortal Magnus too had seen his love ones leave but he refused to go see Will, refused to let his friend go. He refused to remember Will as a grey haired old man, Magnus would always remember him as he was with raven black hair that fell in his eyes that contrasted against his light skin that made his dark blue eyes stand out and shine with intensity. He wanted to remember him as he smirked or laughed or as he smiled whenever he had seen Tessa even when she was the forbidden fruit. So that was the decision he had made, he had sent a letter explaining to Will why he would be unable to make it knowing that he would understand. Yet he had not expected to receive a letter from Will after his passing. Magnus could still remember the pain he had felt reading it.

Dear Magnus,

I have read your letter and I am thrilled to hear that you are happy in your life. Through the years I have lived a very good life; looking back I can truly say that beside Jem you Magnus Bane saved my life. You a warlock, who would have every reason to despise a shadowhunter, still decided to help me with the burden I carried. Even though we have not seen each other in a long time I always knew you watched out for me though I'm not sure why, I would think that you would grow tired of saving me but alas I appreciate what you have done for me.

You once told me that I would grow to be a good man and I hope that I have not disappointed you. I don't understand why you helped me I had nothing to offer you in return though I do recall you saying that you could not ask a favor from a broken hearted boy. My time is near and I can feel it closing in on me; Magnus my friend I have one final favor to ask you and that is to take care of Tessa. As you know she is what I love most in this world and I fear that my death will take the light away from her eyes. I wish for my Tess to live her life even when I'm gone even if it means loving someone else.

It is only you Magnus Bane that I can entrust such a precious person in my life; take care of her for me for this is will be the final favor I will ever ask of you. I will never forget you Magnus even when I'm long gone. Atque in pepetuum, frater, ave Atque vale.

William Herondale

Till this day Magnus remembers every single word that was written in that letter though it had long since perished. Magnus had done his best to help Tessa but even he knew that the loss of a loved one does not heal quickly. For all purposes it never truly heals for the person is always left with a missing piece of their heart and soul.

Suddenly Magnus became aware of the pounding on the steps and before he could do anything Jace Herondale came bounding through the door.