After retrieving the Bewitching Bell Grogar along with Lord Tirek, Queen Chrysalis, and Cozy Glow carry out their plans to conquer Equestria. The villains rampaged through the city of Canterlot, laying it to waste. They then assault the castle were the princess’s along with Discord were waiting for them. They defeat the heroes with little effort. When Princess Twilight arrives to help them she is too late.
 
Background: www.deviantart.com/magister39/…  
Grogar vector by koolfrood  
Tirek by DragonChaser123  
Cozy Glow by jhayarr23  
Discord by EStories  
Luna and Chrysalis vectors found  
Twilight and Celestia by Jeatz-Axl  
Bewitching Bell by AndoAnimalia  
Mlp belong to Hasbro