How to entry?
1. You must have invitation - Moonstone Pendant
How to get invitation?
Moonstone Pendant drop look into "items drop".
2. Go to Entrance - Kanturu Relics X - 140, Y - 186
When Nightmare die (event finished) - enter to refinery opened 24h.
If event lost - You must wait 2 hours to start event again
ITEMS from Maya Left/Right Hand and Nightmare
Go to "List Bosses / Rewards / Location" to know what items drops.