The Shannara Chronicles is actively looking for a new network home after a two-season run at Viacom — one season on MTV and one on Spike. Even before word got out today that Spike — soon to become Paramount Network — has cancelled the fantasy series, The Shannara Chronicles studio, Sonar, and producers had already started conversations with prospective buyers. The Shannara Chronicles, which is based on the best-selling fantasy books by Terry Brooks, streams on Netflix in…