Which episode in season 3 showing Eren having to seal a rock with hardening?


I can’t remember when they showed Eren having to seal a rock with hardening,
flashback or not. It was in season three of _Attack on Titan_.

What episode is it?




In Attack On Titan season 3, episode 8. Eren uses the titan hardening ability
to protect his comrades in the underground of the Reis Chapel.

[![enter image description
here](https://i.stack.imgur.com/mJJ7u.jpg)](https://i.stack.imgur.com/mJJ7u.jpg)

He isn't sealing a rock thou




In Attack On Titan season 3, episode 8. Eren uses the titan hardening ability
to protect his comrades in the underground of the Reis Chapel.

[![enter image description
here](https://i.stack.imgur.com/mJJ7u.jpg)](https://i.stack.imgur.com/mJJ7u.jpg)

He isn't sealing a rock thou

