Lodemungousaur is the combination between Lodestar and Humungousaur's DNA.
He has Humungousaur's body with the details of Lodestar. Humungousaur's lighter tan, green sash, and white belt are replaced by Lodestar's yellow. His tail is black with yellow stripes. He has Lodestar's shoulder spikes, with the yellow replaced by Humungousaur's lighter tan and black replaced by the brown. His head is a brown-grey metal with Lodestar's horn, lines, and glow on it.
I guess give Saur magnetic powers and you get this.
Electricity maybe. I don't know. I don't care enough about Saur to ruin the great alien Lodestar even more than I already have by doing this in general.