Twin Bone

Twin Bone is a pet acquired from pieces given as a reward for clearing one of the bosses in Fortress of Hell Lord Raid (Raid 4). At 5* it gives 7* artifact: Hell King's Skeleton Armor

Acquisition
Guild Raid - Fortress of Hell Lord Raid

Reward for killing Raid Boss
 * Stage 1 - Ancient Death Dragon - 1 fragment
 * Stage 2 - Twin Head Bone Wyvern - 1 fragment
 * Stage 3 - Twin Head Bone Wyvern - 2 fragments
 * Stage 4 - Twin Head Bone Wyvern - 2 fragments
 * Stage 5 - Twin Head Bone Wyvern - 3 fragments