Hydra

A Hydra is a mutli-headed mythological creature.

History
Somewhere in the galaxy, a Hydra-like creature exists. The Skrulls were able to record this creature and could project a hologram of it. They used such a projection on Earth at the Bay of Fundy to distract the Fantastic Four.

Background
The Hydra is not actually named.

In classic mythology, the Hydra was defeated by Heracles, who inspired the Marvel Comics hero Hercules.

In the Comics
The villain team HYDRA takes their name and logo from this creature.