You know since it was revealed that Jocelyn was awake at the end of season 1 I was like who's then gonna explain to Clace about the thing but then in CoG they're in Idris and Clary stays with Amatis and so then the first time Amatis sees Jace (mid season 3) she'll mistake him for Stephen "because they look so alike" and then they're gonna be real confused and then q little later she's gonna see his birthmark and say that it's the Herondale mark but they're just gonna dismiss her as mad with grief and then he's like no I'm a Morgenstern (all gloomily and shit while looking at Clary) and explain that the insignia for Morgensterns is a star so that's why it's shaped like that And then at like the penultimate/last episode when they've freed Hodge he starts explaining about Celine but Sebastian kills him before he can finish "because he presumes Hodge is evil" And then right at the end when Valentine is summoning Raziel, Jace asks about it and then Jace gets weaker and Valentine just laughs and says something along the lines of "I taught you never to trust anybody and surely you knew not to trust me" then continues to laugh but Raziel smites him down and Jace dies at the same time and Clary is just a sobbing mess while screaming at Raziel and then he's revived and they make out and yaaay everything is great but then the episode/series end by revealing that it's Sebastian and his eyes going completely black