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. Why did a divination ...

The secret of Billy's sigil revealed. Billy meets up with all the other witches as Agatha Harkness is assembling this coven and now viewers know that he’s met most of them before in random ways.

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