Just Trying to Live a Good Life

Ty does it because Livvy becomes a danger to the entire shadowhunter society and possibly even Downworlders. But also because he knows deep down that Livvy would never have wanted this to happen and that he has to be the one to end it since he brought her back.

Bonus theory: Kit is so distraught that he gives up his powers in a bargain to bring Ty back through whatever means possible (possibly through some sort of deal with an entity in Faerie or even heaven itself).

I paid attention to this thing Magnus said in my reread of The Lost World:

In Buddhism, hungry ghosts are beings that are tormented by desire that can never be satisfied. Indeed, Livvy seems to be craving something constantly throughout her story: she is overconsumed by the desire to live.

In the following snippet, I think this hunger presents itself pretty well:

She also keeps forgetting Ty when the bond weakens, and on top of that, forgetting herself.

I think this implies something sinister is happening with Livvy, and the heron necklace is there just as a method of slowing things down. So honestly the theory that Livvy would become evil wouldn’t be completely out of left field.

THEIR HANDS BRUSHING

THEM BEING IN A CLUB

KIT WEARING A BRACELET

TY SHOWING KIT WHAT HE IS LISTENING TO

Bc, the guy had a dead sister and a resurrection book... what was he supposed to do? Not bring her back? Who would do that?

"Oh, but what about the consequences..." yeah, what about them? No one even seems to know what are the consequences exactly, or if someone knows they are keeping the secret very well... 

there have been several instances of young baleen whales running afoul of something and being captured for rehabilitation, yes! they were mostly gray whales.

which makes sense, gray whales are slow enough to get caught in the first place and hardy enough to not immediately stress themselves to death over being poked and put in a tank (as long as hundreds of pounds of delicious shellfish are on offer, anyway)

none of them were ever kept very long, they were rehabilitated to a healthy weight and then released. (healthy weight for a juvenile gray whale is almost 20,000 lbs. BIG baby)

how it feels like Cassie is moving rn