Damkath, the Mask
From Destinypedia, the Destiny wiki
Damkath is one of the final Wave 7 bosses at the end of Escalation Protocol. It and several other adds, mainly Dread Unhallowed enemies, will spawn Shriekers that should be destroyed first. The front of the Ogre is immune to any type of damage, and the only possible way to harm Damkath is to damage the pulsating sac on its backside. It is recommended that at two sets of Guardians stay at the front and back of the Ogre as it is basically impossible to shoot the weak spot when Damkath faces the player. Killing the Ogre ends the activity and rewards the player with a shader called GENOTYPENULL-ZERO along with a chest that can only be opened with a Decrypted Key.
List of appearances