Maybe I am over analyzing here but I had always thought once someone dies the active spells they currently have going on would die with them? I pose this question because I know on the wikia we have discussed how Zelena(Marian) became ill with the freezing curse after Ingrid died, but I believe came to the conclusion Zelena was faking? So I ask the same for the town line barrier. Do you guys think Zelena put the spell over the town line and tried to use Ingrid's death as cover? I know when Elsa created the wall Ingrid made sure Elsa couldn't take it down but that doesn't mean Ingrid put the curse on the line because right after Ingrid died Elsa could remove the wall.