_Prerequisites:_ [[01 Weapon Proficiency|Weapon Proficiency]]

Add a new damage die for a specific weapon type. The new damage die is the base damage die for the weapon regardless of the current die used for the weapon. Each upgrade must be purchased individually meaning that you can't jump from upgrade level 1 to upgrade level 3. You have to purchase each individual level.

If the base damage of a weapon includes multiple dice an upgrade still only increases the number of dice by 1.

Cost: upgrade number x number damage dice

Example:
Sword has base damage of 1d6

| Upgrade Number | Cost | Equation                            | # of dice |
| -------------- | ---- | ----------------------------------- | --------- |
| 1              | 6    | upgrade number (1) x # of sides (6) | 2         |
| 2              | 12   | upgrade number (2) x # of sides (6) | 3         |
| 3              | 18   | upgrade number (3) x # of sides (6) | 4         |

Second example:
Better Sword has base damage of 2d6

| Upgrade Number | Cost | Equation                            | # of dice |
| -------------- | ---- | ----------------------------------- | --------- |
| 1              | 6    | upgrade number (1) x # of sides (6) | 3         |
| 2              | 12   | upgrade number (2) x # of sides (6) | 4         |
| 3              | 18   | upgrade number (3) x # of sides (6) | 5         |