NOTE: You can now obtain the Electrified Bone Bladed Claymore after you've finished the original quest. By right-clicking on the forge in Runnyeye with both the standard Bone Bladed Claymore and Berik, Sword of Thunder in your inventory (but not equipped), you can choose to "Break Berik over the forge." Berik and the BBC will be removed from your inventory and you will receive the Electrified Bone Bladed Claymore. If you choose to do this, you cannot change the EBBC back to the other two swords, so please be sure of your decision.
Seize the glowing sword at the top of the spiral stairs in Sturmfeste . An Inert Bone Bladed Claymore will appear in your inventory. Examine it to be offered the quest.
NOTE: You can now obtain the Electrified Bone Bladed Claymore after you've finished the original quest. By right-clicking on the forge in Runnyeye with both the standard Bone Bladed Claymore and Berik, Sword of Thunder in your inventory (but not equipped), you can choose to "Break Berik over the forge." Berik and the BBC will be removed from your inventory and you will receive the Electrified Bone Bladed Claymore. If you choose to do this, you cannot change the EBBC back to the other two swords, so please be sure of your decision.