It's Just a Mask

Majora's Mask crossover. Majora's Mask has made its way to Equestria, and is doing what it does best; destroy worlds.

The Cutie Mark Crusaders, convinced their long sought cutie marks are for exploration, plan a daring trek through the Everfree Forest.
They don't find their cutie marks out there, but what they do find is much more interesting.
And much, much more malicious.

Everyone