Courier's Trial Keystones are Genshin Impact Quest Items that can be obtained by solving three puzzles in the Ancient Temple. These are used to activate a Scions of the Canopy World Quest called To the Night, What is the Night's. Follow my walkthrough below to solve the puzzles and get three Courier's Trial Keystones.

To get the Courier's Trial Keystones, you'll need to transform into a Yumkasauri and solve three puzzles around the Ancient Temple. The keystones can be found in the Exquisite Chest rewards, so be sure to loot them right after. You can solve the puzzles in any order.

Head to the area circled above in the Ancestral Temple to find the first puzzle. Start by transforming into a Yumkasauri using the nearby symbol.

Now that you are a Yumkasauri, you can follow the steps below to solve the puzzle: