Did you take part in the Super Guild War? And did you get a Grateful Guild Member Box in your inventory? Seems everything is about guild in March. Here is another one! Tomb Rush will be from March 16th to 30th, gear up and honor your guild! Hunt the monsters for the lost treasure in the tomb and submit the treasure for rewards, and there will be extra rewards for guild members.
Please check out more detail about the event here.
Note: The Tomb is a PK zone, the items in your inventory may drop when you are killed, please plan accordingly.