Servant of the Hand
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Location
This level 22 Thrall is found in Old Russia, in the darkened room where the player first meets the Hive on Earth. Go all the way to your right from the entrance, and in a pile of garbage, you will see the Servant of the Hand, curled up. He is partially concealed; he may be a little tricky to find at first, as most of they corners have garbage in them.
Behavior
If attacked, he will get up, screech like a Thrall, and charge. Green Hive portals will appear near the four corners of the room, and the Hand of Crota will appear, a Hive Knight wielding a Cleaver. More Servants of the Hand will appear, as will Hive Wizards. Killing the Hand of Crota is the only way to cease these waves.