'The Witcher' star MyAnna Buring breaks down Tissaia's tragic moment in season three: 'I'd known this would happen from the beginning'

• Warning: Major spoilers for "The Witcher" season three, volume two.
• In the final episodes of season three, Tissaia is betrayed by someone close to her.

"The Witcher" star MyAnna Buring is revealing all about filming Tissaia's tragic death at the end of season three.

In the final episodes of season three, Tissaia is reeling from the battle in Aretuza, specifically being betrayed by her lover, Vilgefortz (Mahesh Jadu), who has been working for the enemy the entire time. In the heat of battle, Tissaia uses a forbidden spell to kill the forces invading Aretuza.

However, in the season finale, wracked with guilt over her decision, Tissaia dies by suicide.

Speaking to Insider, Buring said she was prepared for her final scene, but that did not stop her from crying after filming it.

"I'd known that this would happen in season three from the very, very beginning," Buring said. "Season one, I was very clear what would happen in season three, so I think when I first read the scene, I was quite pragmatic about it. I was like, 'Okay, that's the scene. That's how they've chosen to do it. Great. I understand. That's lovely.'"

Buring said that it was a different scene that was her most difficult to shoot — the scene where Tissaia leaves a letter for her mentee, Yennefer (Anya Chalotra).

The actor said: "It was the scene beforehand that I found really emotional. I had to read the letter that I write to Yennefer, and I sort of read it over and over again. And so, in my mind, that was playing over and over again while we were shooting the scene. And, suddenly, that's when I went, 'Oh God, that stings.'"

After wrapping her time filming on "The Witcher," Buring said there was a big celebration on set.

"I remember when I wrapped, going off set, and that's when it hit me," the actor recalled. "I think I bawled quite a lot. But then, all the Aretuza gang were in the makeup room, so I think we celebrated with bubbly and joy and laughter and dancing as we always did."

Buring said that while she was emotional about her character's death, she was even more emotional about her time working with the cast and crew "coming to an end."

"I feel such gratitude, such enormous gratitude," Buring said. "I've had the best five years working on this series. I've had so much fun. I've watched incredible actors doing their stuff, coming on set, bringing their energies, and growing up in front of my eyes. It's been an utter, utter joy."

Buring's costar Therica Wilson-Read, who plays sorcerer Sabrina, told Insider that Buring was like a "Mama Bear" and "pillar of strength" to the cast.

Anya Chalotra, who plays Yennefer, told Insider in a joint interview with Freya Allan that her "greatest experiences on the show" were working with Buring.

"She's a force," Chalotra said. "I wouldn't be the person I am today without her, quite honestly. So, yeah, it was hard. And I hope people this season are as in awe of her and what she's done for the show as I am, as we all are."

Allan, who plays Ciri, said that she was "really emotional" watching Buring's final scenes because she knew how close Chalotra and Buring became on set.

"I know how much she's meant to you in this whole journey," she said, turning to Chalotra. "Especially season one being so hard, and her being there with you through that."

"The Witcher" season three, volume two, is available now on Netflix.