'The Shannara Chronicles' Trailer: There Are 'Dark Days Ahead' In The Four Lands

Watch the latest jaw-dropping clip now!

"The Four Lands is in grave danger. You three -- you can save it."

That is the stern and vital message issued in the latest trailer for “The Shannara Chronicles,” MTV's highly anticipated fantasy series based on Terry Brooks' beloved book which is set to debut in January 2016. And as the visually stunning brand-new clip -- which was just unveiled at New York's Comic Con -- shows, the diverse trio of characters (Amberle, Wil and Eretria) are about to embark down an arduous road in the post-apocalyptic world.

Or more accurately, as King Eventine declares, "There are dark days ahead."

The specific trouble at hand, conveyed in the dialogue-heavy montage clip: The majestic Ellcrys -- which has a specific group of protectors -- ensures that as long as it lives, the demons will be locked up for all eternity. But the vital tree is dying, and as each leaf (which represents a single demon) falls, the wise druid Allanon warns that "the creatures of darkness will be released one by one." And yes, these horrific beings are coming, and our young heroes are ready for battle.

Watch the unbelievable action unfold in the trailer below, and be sure to stay with MTV News for more "TSC" updates leading up to the big premiere!