This guide explains how to unlock the weapon slot in The Seven Deadly Sins: Origin (7DSO). Includes how to unlock the second and third additional weapon slot and their importance.
What is the Weapon Slot?

In The Seven Deadly Sins: Origin, characters can equip up to three weapons, each influencing their attack style and available skills. However, additional weapon slots are initially locked and can only be unlocked by increasing the Shared Mastery level.
How to Unlock Weapon Slot
Reach Shared Mastery Growth to 30

To unlock a character's additional weapon slot, go to the Hero Info menu and select the Mastery tab. From there, use Mastery EXP materials to raise the Shared Mastery to 30. Once this requirement is met, the additional weapon slot will be unlocked.
Why Weapon Slot Is Important
Sub-weapon Provides 30% Attack

Once the additional slot is unlocked, the character can equip up to three weapons, with different stat scaling applied to each slot. The primary weapon provides full stat values, while sub-weapons contribute 30% of their Attack, serving as secondary sources of stats.
Weapon Type Affects Attacks and Skills

Unlocking an additional weapon slot expands build flexibility, allowing you to optimize both character performance and team composition. Since each weapon type changes a character’s attack patterns, skills, and overall effectiveness, weapon choice plays a significant role in performance.
Note! | Unlocking an additional weapon slot allows you to adjust builds based on your preferred playstyle and team composition. |
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