After completing the main game in Dynasty Warriors: Origins, you can use the reforging feature to make your weapons even stronger. Reorganizing enables you to upgrade and modify your current weaponry to suit your preferred fighting style rather than merely searching for better weapons at random. This is more of an added function that the game provides to all players rather than something that is broadcast to them. You’ll probably have a problem with the way it’s done, but it helps when you know how to do it.
In contrast to earlier games in the series, this type of feature isn’t available to you beforehand, but it can make the game much easier and feel like a reward for your efforts. Reforging allows you to alter a weapon’s unique characteristics or increase its power to make it hit harder. Regretfully, that implies you have to fulfill a prerequisite before proceeding.
How To Reforge Weapons: A Complete Post-Game Guide for Dynasty Warriors: Origins

You can only use the weapon reforging feature in Dynasty Warriors: Origins after completing the main plot. After the campaign, load your saved game and navigate to any city on the map to access it. The primary weapon, which you wish to enhance, and the secondary weapon, which you need to use as material, are both identical. In each city, you will be able to reforge your weapon, which will make it incredibly simple.
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The upgrade is dependent on the secondary weapon’s level, but it must have the same name and kind as the primary weapon. For example, a “Sky Splitter +2” can be used with a simple “Sky Splitter,” but not with another weapon. Reforge power and characteristics are the two primary possibilities for reforging.
Your weapon’s attack power is increased by reforging power. The boost is equal to one (+1) times the secondary weapon’s level. Therefore, your primary weapon will receive a +16 boost if you use a “+15” weapon for this. The greatest power boost with this straightforward method is +99, although it necessitates a large number of duplicate weapons.
With Reforge Traits, you can personalize your weapon. Dynasty Warriors: Origins weapons contain random characteristics (such as improved parry timing or additional damage to officers). This option allows you to swap out a trait from your primary weapon for one from your secondary weapon. But any attributes you don’t select will likewise be gone, and the backup weapon will be destroyed. Finding weapons with several qualities is useful to achieve the most personalization because a weapon’s number of traits remains constant.
Given how frequently officers drop weapons, it is best to battle and beat them to obtain extra weapons for reforging. Weapons can also be purchased from stores, but the cost is significantly higher. To build powerful, personalized weapons, carefully choose your qualities and have a solid strategy for assembling duplicate weapons. For instance, if you defeat Zhang Jiao, you will receive a reward.
Best Tips for Upgrading and Customizing Weapons Through Reforging

In Dynasty Warriors: Origins, reforging is a system used to enhance weapons. You can only access this system after completing the main campaign with any of the three sides. Load your post-game save after finishing the tale, and you’ll see the Reforge option at weapon shops all around the game world.
The game only offers weapons to reforge; it lacks an “upgrade” system. In combat, you can either purchase a stronger weapon or obtain one from a high-ranking enemy or officer. If not, upgrading your weapons won’t be possible until you’ve completed the game at least once. Anytime you want to improve your weapon after you’ve won the game, simply go ahead and reforge it.
Two identical weapons are required for reforging: the primary weapon, which is the weapon you wish to upgrade, and the secondary weapon, which is the second identical weapon to be used as material. Weapon types and names must be the same; for instance, a +1 weapon cannot be used with a +10 version. The upgrade depends on the secondary weapon’s level, although they must share the same name. In Dynasty Warriors: Origins, reforging can be as simple as that.