Alec Lightwood: It’s been hundreds of years since you banished your father. What makes you think he’ll even listen to your request?

Magnus Bane: Let’s just say he owes me one.

Alec Lightwood: For what happened with your mother?

Magnus Bane: That… and for everything in the years that followed. I was living on the streets. I didn’t know who or what I was. Asmodeus took me in. Nurtured my darker impulses. And taught me the “proper” way to be a warlock.

Alec Lightwood: And why’d you listen to him?

Magnus Bane: Because he was the only one in the world with eyes like me. He was my father.

From Shadowhunters – Season 3 Episode 10: ‘Erchomai’ (3×10)