Zoruim

Gamu Takayama is a 20-year old member of an organization called Alchemy Stars. He invented most of the technology used by XIG, the combat division of GUARD, which is a super-organization dedicated to peace on Earth. During some virtual reality experiments, which he performs with the secret purpose of discovering the will of the Earth, he briefly encounters the mysterious glowing red giant, Ultraman Gaia, at the end of a tunnel of light. He witnesses a fierce battle between Gaia and a snake-like creature, called Zorlim, inside what appears to be the center of the Earth itself. Gaia eventually used his finishing move, the Photon Edge, to completely obliterate Zorlim.

Zorlim Big
As Ultramen Gaia and Agul were fighting a wormhole was absorbing the energy they were giving off. After ending in a draw the wormhole, now called worm zone, was disrupting weather conditions. Teams Lightning, Falcon, and Crow were launched and as they approached the portal Zorlim popped his head out. Whether he came to Earth just to destroy it or for revenge on the death of the first is unknown, but he used his flames to cause wanton destrucion on the people below and XIG's attacks didn't even get his attention. After giving consideration, Hiroya gave Gamu the energy of Agul because he realized that Gaia would make the better guardian for the Earth. As he went off Zorlim's flames exploded and he disappeared. To insure his sacrifice wasn't in vain Gamu turned into a new and improved Ultraman Gaia. The new form headed for Zorlim and used his Quantum Stream, but it did little than annoy him. Shortly after Gaia turned into Ultraman Gaia Supreme, went inside Zorlim, and used the Photon Stream to blow the monster's skull to pieces. The worm zone closed just seconds after.