Starting when you are able to prepare before battles, you can access a forge feature via "Armory" >>> "Forge".

Basically, you pay gold to upgrade a certain weapon. This is useful in helping weaker characters out at the beginning.

There are different stats you can upgrade:

Mt (Short for might): Upgrades how much you can damage.
Hit: Upgrades how often you hit.
Crit (short for critical): Upgrades how often you land a critical.
Wt (Short for weight): Changes how hefty a weapon is, a less heavy weapon lets the user hit x2 instead of the regular one hit.

First, you have to pay the initial cost. This depends on what type of weapon your unit is holding. It also depends on the type of weapon (Bow, Sword, Axe)

Note: Devil Weapons cannot be forged. Firestones cannot. Also, items like the Parthia cannot be forged.

Also note that the price does not change if you are forging an item with only 1 durability compared to if you forged it with 30 durability.

Here are the initial costs:

Cost = Base Value/2 (refer to above) + ((Decimal upgrade) X Base Value)

Here is the way the upgraded stats are worked out:

Most of you are probably wondering what the above section was all about. Well, simply put, you need to refer to the top chart for each upgrade you make.

That means that if you upgrade the damage, hit rate, and critical, then you need to refer to the above chart three times. Basically, just find the % for all three stats.

For example, if I am forging a weapon and making it have +1 Mt, +10 Hit, and +3 Crit, then I will find the three %s: 50%, 150%, and 50%.

Then, you need to make them into decimal form them add them together. Taking my example above, I get:

0.5 + 1.5 + 0.5 = 2.5

This number is the cost for the upgrade (called the decimal upgrade in the equation).

Let's put this to example. Say I am forging a Silver Sword for +1 Mt, +50 Hit, +27 Crit, and -4 Wt. Here are the steps:

Find the base cost of a silver sword. 2000G.
Refer to the charts and get the four %s. In order: 50%, 2750%, 2250%, 500%
Convert them into decimals. In order: 0.5, 27.5, 22.5, 5.
Add them together to get 55.5.
Plug in the equation:
2000/2 + ((55.5) * 2000) = 112,000