The Hive is formed of thousands of creatures who inhabit Hallows body living underneath his protective carapace. Having nearly completely replaced all of Hallows internal organs resulting in a extremely hardy constitution, and lack of need for eating/sleeping. However the Hive must sustain itself and so must be unleashed periodically.
When unleashed the hive resembles thumb-sized wasp like creatures with a distinctive orange band along the thorax. Able to take disassemble all materials that aren’t protected by some form of galactic energy they are a formidable offensive and defensive weapon.