How do I start the "The Hero's Cache" side quest in The Legend of Zelda: Breath of the Wild?

To start "The Hero's Cache" side quest in The Legend of Zelda: Breath of the Wild, you need to travel to the Outskirt Stable, which is located in the western part of Hyrule Field, near the edge of the Gerudo Desert. This stable is situated southwest of the Great Plateau and northwest of the Coliseum Ruins. The quest is given by an NPC named Rensa, who can be found near the stable. Rensa is a former soldier who has a keen interest in training and combat techniques. He will ask you to retrieve a cache of weapons that he hid in a nearby cave, which he refers to as "The Hero's Cache."

To begin the quest, speak with Rensa at the Outskirt Stable. He will explain that he hid a stash of weapons in a cave near the stable but has forgotten the exact location. He will give you a clue that the cave is located near a large tree with a distinctive shape. This tree is known as the "Dueling Peaks Stable Tree," which is a large, uniquely shaped tree located to the east of the Outskirt Stable. The cave is hidden behind this tree, and you will need to search the area carefully to find it.

Once you locate the cave, you will need to enter it and retrieve the weapons. The cave is not particularly difficult to find, but it is easy to miss if you are not paying close attention to the environment. The entrance is partially obscured by foliage, so you may need to cut away some bushes or use a torch to light your way if it is dark. Inside the cave, you will find a chest containing a Soldier's Broadsword, which is the weapon Rensa is referring to. There are also a few other items scattered around the cave, such as arrows and a shield, which you can collect if you wish.

After retrieving the Soldier's Broadsword, return to Rensa at the Outskirt Stable to complete the quest. He will be pleased that you found the cache and will reward you with a Silver Rupee, which is worth 100 rupees. This is a decent reward for a relatively simple quest, and it can be a good way to earn some extra money early in the game.

There are a few important tips and considerations to keep in mind when completing this quest. First, make sure you have a decent weapon and shield before heading into the cave, as there are a few enemies in the area that you may need to fight. The enemies are not particularly strong, but it is always good to be prepared. Second, if you are having trouble finding the cave, try climbing to a higher vantage point and using your Sheikah Sensor to detect the chest. This can help you pinpoint the exact location of the cave. Finally, if you are playing in Master Mode, be aware that the enemies in the area will be stronger and more aggressive, so you may need to adjust your strategy accordingly.

One common mistake players make when attempting this quest is not paying close enough attention to the environment. The cave is hidden behind a large tree, and it is easy to overlook if you are not looking carefully. Make sure to explore the area thoroughly and use your Sheikah Sensor to help you locate the chest. Another mistake is not being prepared for combat. While the enemies in the area are not particularly strong, they can still pose a threat if you are not careful. Make sure you have a good weapon and shield before heading into the cave.

In terms of advanced techniques or optimizations, you can use the paraglider to quickly travel from the Outskirt Stable to the cave. This can save you some time and make the quest easier to complete. Additionally, if you have the Stasis rune, you can use it to freeze enemies in place and make them easier to defeat. This can be particularly useful if you are playing in Master Mode and the enemies are more challenging.

Overall, "The Hero's Cache" is a relatively simple side quest that can be completed early in the game. It is a good way to earn some extra rupees and gain some experience with exploration and combat. By following the steps outlined above and keeping the tips and considerations in mind, you should be able to complete the quest without too much difficulty.