Piety, the Church of harmony's best new acolyte is tasked with the duty of finding and killing the demon mare Pinkie Pie. To do this he has to follow in the wake of utter chaos and go on a journey that will scar him right down to his very soul. He sends you, the Arch-Cleric, letters whenever he can to inform you of his progress.

Disclaimer: this is a War for Equestria group story. Link is found below for more information on the universe and fanon.

http://www.fimfiction.net/index.php?view=group&group=703