Ambrose has been Sabrina's guiding light when it comes to the magical realm, helping her learn about and defeat the Eldritch Terrors as they arrive. During the final episode, he helps Hilda and Zelda connect Sabrina Spellman's soul with Sabrina Morningstar's body after the former goes into The Void to destroy it. Upon realising Sabrina now is one with The Void, he travels to the Mountains of Madness to bring her back with Agatha, Prudence, and Roz. It's here he discovers that Sabrina has a plan to defeat The Void. When the entire group comes back to rescue those that are trapped, Ambrose, Nick, and Harvey are the ones that enter The Void to bring the survivors back. He emerges from The Void with Prudence at his side, suggesting that they may someday rekindle their romance.