From Destinypedia, the Destiny wiki
Vex Sol Collective
Heroic Mercury Adventures Haunted Forest Verdant Forest
Summon Vex High Durability Rapid Flight Midair Levitation Rotational Shields Hydra Death Blast Block Path
The Branched Mind, Proxy is a Vex Hydra simulation seen in the Infinite Forest, where it acts as a Daemon firewall to inhibit any intruder attempting to progress through the Forest.