Cyclops from the X-Men. Since he's a mutant, he would be born with the power to fire laser beams.
And since morphing heals injuries, I don't get the angst of killing everything without meaning to.
Who said the battle morph had to be an animal? (technically, mutants are animals as well)
And so what if Cyclops is fictional? The entire concept of morphing is fictional. If I had the fictional ability to morph into any biological creature, why not morph into an equally fictional mutant with genetically derived super powers?