From the desk of Princess Celestia herself.
My loving subjects,
It is with a heavy heart that I must call my warriors into action.
I know you are far from home in a strange land but you are crucial to stopping a changeling invasion. A northern swarm has emerged from its icy cave and has moved south in an attempt to conquer territory and feed off the love of the residents. Our own intelligence has informed us that the city of Richmane is their prize. They must be repelled, for I say ‘let tyrants fear’.
My sisters and I have placed our strength and safeguards in the loyal hearts and love of our subjects.
I ask that you follow Princess Apricity as you would follow me. Please take the time to read her letter to her subjects.
Her Royal Majesty,
Princess Celestia