Fics like How to train your dragon friend.

Mk, an undersized demon teen wishing to become a dragon slayer like the other demons, injures a rare Emerald Fury dragon but is unable to bring himself to kill it. He instead helps and befriends the dragon, and quickly discovers that things are not exactly as they seem in the conflict between his people and dragons. Lego Monkie Kid and How to train your dragon crossover.

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