Part two of a trilogy (The Coming of Stellas Spatium, Tirek's Reform and Starswirl's Return) that summaries how I would end the show were it up to me.

After killing his sisters, Stellas Spatium plans to enslave both Equestria and other dimensions; while his bounty hunters hunt for the group, The Mane Six, Cadance, Starlight Glimmer, Trixie, and Spike escape to a strange dimension to formulate a plan to stop him, while an old foe ultimately decides to team up with them after Spatium declines to work with him.