Weapon core Etheric light Some experience Mote of light/strange coins from the small chest Chance for an elder chiper after killing the boss And standaard rewards form the big chest (queen weapon) It's pretty easy to defeat him. Run to the left and kill the adds, wait until the special dregs are gone. Snipe kalkis health down until the target spawns. Kill it and clear the adds, then finish him off. Good luck ;)