The `skill_extra_item_template` table
...
Field | Type | Attributes | Key | Null | Default | Extra | Comment spellId |
mediumint(8) | unsigned | PRI | NO | 0 |
| SpellId of the item creation spell | |
mediumint(8) | unsigned |
| NO | 0 |
| Specialization spell id additionalCreateChance | |
float | signed |
| NO | 0 |
| chance to create add additionalMaxNum | |
tinyint(3) | unsigned |
| NO | 0 |
| max num of adds |
...