Hive (Marvel Cinematic Universe)

""Thousands of years ago, an Inhuman was born on this planet that was destined to rule it, so powerful, so fearsome that others were consumed with dread, and so they banished it from the Earth, sent it through the portal to a distant planet. HYDRA was founded with the sole purpose of engineering its return.""

- Gideon Malick

It is the designation of an incredibly powerful Inhuman from the Marvel Cinematic Universe. It serves as the true main antagonist of the third season of the hit TV series, Marvel's Agents of S.H.I.E.L.D.

Biography
Many millennia ago, The Kree, a powerful alien race went to many worlds to create Inhumans, one of them was Earth. It was on Earth where the Inhumans were successfully created. One they created was particularly powerful was greatly feared so it was banished from Earth to Maveth, a distant alien world. However, a group of humans who all intents and purposes worshiped it, thought it was the world's rightful ruler. This group evolved and took many names. During World War II, they infiltrated the Nazi's and took the name HYDRA under the direction of it's then leader, Red Skull. This group's sole intention, to bring back this dangerous Inhuman to Earth. For centuries they had tried and failed.

In 2001, a group of Astronauts from NASA was sent in as a sacrifice to this thing as they had done to many others over the centuries under the guise that they were sent in to do scientific research. It made them go mad, killing each other, leaving their bodyguard, Will Daniels alive. Daniels stood on that planet, eluding it for 14 years. Then in 2015, SHIELD agent and biochemist, Jemma Simmons, was brought to that planet accidentally and for months, Jemma with the help of Will Daniels survived long enough for her SHIELD colleagues to bring her back. Now the heads of HYDRA are going to seek out SHIELD to try to find out how to bring back this deadly Inhuman for it to takeover Earth.