Trollhunters

Season 3 of Trollhunters: Tales of Arcadia.
Meanwhile, Jim slowly begins to transform into a half-troll, and he and his friends must tell their parents the truth and seek out Merlin to stop the ancient evil. Claire faces risks with her shadow magic, and Angor Rot returns, sometimes as an enemy, sometimes taking his own path. To gain enough strength, Jim takes a potion from Merlin and truly becomes half-human, half-troll – the only one capable of facing Gunmar on equal terms. In the final battle of the Eternal Night: Jim defeats Gunmar; Morgana is banished to the Shadow Realm , and Angor Rot helps make it happen. The Stone Heart of the Troll Market is destroyed, and the place ceases to exist. You are Douxie's younger sister/brother, and also an apprentice of Merlin , who has been raising you two since you were children.