Zoanthrope

Zoanthropes are perhaps the strangest of Tyranid creatures. They are powerful psykers, apparently engineered from harvested Eldar DNA to form living conduits for the focused power of the hive mind. So extreme is their development that their atrophied bodies and bulbous heads are entirely energized by psychic force. They can move only by psychically levitating themselves, drifting across the battlefield to rain bolts of incandescent power on the enemy or relay the synapse commands of the hive mind to its lesser beasts.