Hello, commanders.
This is GM Tia from Light of the Stars.

We have identified an issue where only  Blackstone Crystal is awarded when commanders win the treasure chest reward after defeating the guild boss.

This issue will be resolved when the guild boss resets next week.

After the guild boss reset next week, we will provide Void Spells to all commanders who received only 1 Blackstone Crystals.

We apologize for any inconvenience this may have caused.

Thank you.