That flashback included learning who placed the sigil spell on “Teen” in Agatha All Along. It was his own future Witches’ Road travel companion, Patti LuPone’s Lilia.

Apparently that sigil was more powerful than we thought. Episode 6 of Agatha All Along, titled "Familiar by Thy Side," revealed that Lilia Calderu, Patti LuPone's divination witch, was the one who ...

Agatha All Along reveals Lilia is responsible for the sigil on Billy, ... Patti LuPones divination witch joined Agathas (Kathryn Hahn) coven unwillingly, but has proven to be the soul of it.

Agatha All Along's sixth episode finally revealed who placed the sigil spell on ... Why did a divination witch put a sigil spell on a boy who didn’t possess any magic just moments before he died ...