“The Feast” is the twentieth main quest in Kingdom Come Deliverance 2, where you initially take control of Father Godwin at Raborsch Fortress celebration.
At the start of the quest, Godwin is seen drunk, his vision blurred, and his movement unsteady, as he enjoys celebrating with friends.
During the quest, players can interact with the guests and enjoy the celebration by engaging other guests with a Jug of Wine.
Interact With Guests And Search For The Jug Of Wine
After socializing with the guests, you should speak with John of Liechtenstein, who waits in the northern corner of the starting room.
During your conversation with Liechtenstein, regardless of your dialogue choices, he will eventually task you with retrieving more wine from the cellar, which advances the main quest objective.

To find the Jug of Wine, you need to head downstairs toward the wine cellar. The cellar is located on the first floor you encounter when climbing the stairs toward the meeting chamber.
Inside the cellar, you will immediately spot the wine pitcher (sometimes, it is presented as red wine in different game versions). All you need is to go close and pick up, and this objective will be marked as completed.

Actually, finding a Jug of Wine becomes meaningful when you start going out of the cellar. Upon climbing up the stairs, a cutscene will trigger automatically.
Defend The Raborsch Fortress For The Feast Quest
Once you find the Jug of Wine, the peaceful celebration of Raborsch Fortress is interrupted by a soldier opening the gates to a sudden assault by forces from Lord Von Bergow on Raborsch’s fortress.
Following the attack, you will encounter a new objective to Defend the Raborsch fortress. However, an essential task would be to save Christopher Oderin, Father Godwin’s brother, who is wearing green attire and can be found in the right corner of the courtyard during that defense action.

Successfully keeping him alive throughout the battle will earn you the “Die Another Day” achievement later in the quest.
Finally, after defeating the enemies as a Godwin, the perspective shifts to Henry, who rides toward Raborsch to join the battle.
After gaining control of Henry, you can speak to John of Liechtenstein and progress further in the game, leading you to the next main quest, Exodus.