LOTM: Darkness Rising S1 P3 "Enemy of my Enemy"

LOTM: Darkness Rising Part 3 is the third part in the 13 part season 1 of the Darkness Rising storyline.

Synopsis
The Protectors begin their search for the pony Stygian, believing his corruption had something to do with the Shadowrealm, meanwhile, Tempest and Cormack try to form an alliance with Atlas in order to fight Delanis's forces.