During their September 13 show at the House Of Blues in Las Vegas, NV, Testament were joined onstage by guitar prodigy Maya Neelakantan for a performance of “Curse Of The Legions Of Death (C.O.T.L.O.D.).” You can see fan-filmed footage of that below. Neelakantan, who is currently competing on “America’s Got Talent”, commented: “Just played with…