Metal Allegiance, the metal supergroup featuring core members David Ellefson (Megadeth), Alex Skolnick (Testament) and Mike Portnoy (The Winery Dogs, ex-Dream Theater), along with multiple special guests, have posted a new webisode for their previously released song “Can’t Kill The Devil” featuring Chuck Billy (Testament), Phil Demmel (Machine Head) and Andreas Kisser (Sepultura). You can…