The Fogg

The Fogg was a creature which appeared in the Ben 10 animated series episodes Fear the Fogg and Moor Fogg.

Description
A being seemingly formed from living mist, The Fogg was capable of changing its shape to assume any form it wished, and fed upon sources of energy such as that supplied by car batteries and electrical sockets. It was immune to almost all types of attack, but was vulnerable to rays of light. Where The Fogg originated from, and what its motives were, has not been revealed.

History
When Team Tennyson were driving through the American countryside in the Rustbucket on their vacation, they entered an unusual fogbank. Upon entering the bank, they were attacked by The Fogg and Ben, in his guise as Heatblast, attempted to burn the creature off. After this failed, he changed to his Overflow configuration and fired great streams of water at the creature in an effort to over-saturate the air with moisture and cause The Fogg to wash away. This manoeuvre also failed however, and Ben reverted back to Heatblast and resorted to simply pushing the Rustbucket away from the monster as quickly as possible. Upon leaving the fogbank, as soon as it was struck by the light of day, The Fogg disintegrated into its component liquid.

Later, when the Tennysons visited Scotland in the Omnicopter, The Fogg somehow found them there and attacked again. This time, it went after the batteries contained within the Omnicopter. Attempting to use the 'copter's spotlights to burn the creature off, Grandpa Max discovered that this only fed the beast and made it stronger. Eventually, Ben was able to change into his Diamondhead form and used the alien's crystalline properties to magnify the power of the beam, chasing the creature off, but leaving it otherwise unharmed in the middle of the Scottish highlands.