Description by couchtuner for Gravity Falls Season 2 Episode 15 : A new threat sees Mabel going into the enchanted realm of the unicorns. Dipper finds something out about the enigmatic Bill Cipher.
Watch It Here Option 1 : Gravity Falls Season 2 Episode 15 The Last Mabelcorn
Watch It Here Option 2 : Gravity Falls Season 2 Episode 15 The Last Mabelcorn
