Salt and Sanctuary

To achieve this ending, one must interact with the scarecrow at all points it spawns throughout the game. I haven’t done any extra testing on response combinations, but these were the responses I gave it at each location before finally speaking to it after the final boss.

1. Village of Smiles - can be found just above this location’s sanctuary. Answer - “No”
2. Castle of Storms - can be found by continuing through the gate on the bridge with the giant guardian. Must have defeated the Kraken Wyrm and unlocked the Shadow Flip Brand to open the gate. Answer - “Yes”
3. Ziggurat of Dust (lower) - can be found to the left of the sanctuary just before The Bloodless Prince. Answer - “No”
4. Crypt of the Dead Gods - can be found at the entrance after defeating The Unskinned & The Architect. Answer - “Dominion”
5. The Still Palace - after defeating The Nameless King, continue past the well. The scarecrow can be found here as long as none of the previous instances have been missed. Speaking to them will start the cinematic and a unique poem based on your creed for the Dominion ending.

Note: I can confirm that the save scum method can be used to get both endings in one run. To do this, after beating Nameless King get your save to sync to the cloud (save and quit using the in-game menu, dashboard, close the game manually, then restart the game).

Once the save is confirmed, go back into the game, start one of the endings, dashboard after the achievement unlocks, push the start button on Salt and Sanctuary (three-bar button), select manage game and add-ons, select Saved Data, select your save, then select Delete from Console. *DO NOT SELECT “DELETE EVERYWHERE”*

Go back into the game, and your save should put you back to just before selecting your ending.

Edit: Per Anavryn, "This may have been patched to prevent getting both endings on the same save." Will need feedback from others to confirm.