The Shannara Chronicles - All Seasons

The Four Lands, normally a land of magic and peace, faces a threat beyond man: Demons. Banished ages ago, they were held back by a magical wall known as the Forbidding. Yet the source of that magic, the magical tree known as the Ellcrys, is dying, and thus the wall wanes. When the acolytes who tend to the tree are all killed, the wise Druid Allanon turns to Amberle, the last remaining disciple, to save the tree. Only she can take the seed of the Elven tree to the faraway Bloodfire, to replant the Ellcrys and stop the Demons. To protect her, Allanon sends the young Wil Ohmsford, a descendant of heroes past. As the two youths head on a perilous journey, Allanon and the entire Elven Nation stand together to hold back the Demons and stop them from destroying the Four Lands.

Season two takes place one year after the events of last season. The Four Lands are in chaos. The re-emergence of magic has the populace terrified, and an organization called The Crimson is hunting down magic users, using fear and intimidation to sow discord among the races. Wil, scarred by the loss of Amberle and his separation from Eretria, has turned his back on his magical destiny to become a healer. But when a mysterious woman named Mareth saves Wil from a Crimson attack, he is forced to rejoin the fight.