This is Arkron, the psychopathic super creature the crew of Space Cargo Atlantis fight during one of their adventures. He is - just like the whole story - a sort of (involuntary...) tribute to an episode of the original Star Trek series. This character, however, is definitely evil, unlike the one in the ST episode. He hurts and uses other creatures knowingly and intentionally, out of his totally scary madness. I don't suggest you invite him to your next party ;-)