The Unbeatable Master [FULL EPISODE] | Slugterra: Episode #21

A mysterious slugslinging master appears for the first time in 20 years. Though old, this slinger is an amazing battler - incredibly fast and the master of an unstoppable slinging technique. Eli, Kord, Trixie and Pronto all want to study with the master and learn this awesome move. But so does Dr. Blakk’s protégé Twist! Now Eli must face off against Twist and prevent the master from choosing a villain for a student.
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Eli Shane is determined to be the greatest Slugslinging hero of all. But in order to defeat the forces of evil, he must collect, train and duel with little critters called slugs, which transform into powerful magical beasts. Eli and his crew explore the caverns, challenge rivals and one another to friendly duels, and upgrade their gear in their underground world. But there is a threat to Eli and the slugs -- Dr. Blakk wants to transform the slugs into feral mindless weapons. No one has been able to stand up to Blakk's army of henchmen ... until now.