When the windigos came, the only way to stop them was to end the acrimony. A thousand years later, Princess Twilight thinks that may have been a mistake. And she knows how to solve it.
I spent the entire episode unable to stop seeing the angry frogs that make up Cranky and Matilda's muzzles. Seriously, just look at the lighter-colored bit at the nose and it's an angry frog.
{EVERYTHING ELSE HERE IS SPOILERS} {STOP HERE IF YOU DESIRE NOT THE SPOILAGE}