THE SEASON 4 FINALE FOR MLP WAS AWESOME.
LUNA SANG :jawdrop:
CADENCE SANG.
THERE WAS DERPY.
THERE WAS A CENTAUR.
AND DISCORD. DISCORD :O
however, it's kind of a waste of space to use Tartarus to imprison only ONE bad guy. Why not seal in the stoned Discord?
also, why only ONE guard (well, i guess it can be three, because of his heads, but there's only one body)? Cerberus is fabulous, but what'll happen when he goes off to chase a bouncy ball? You need, like, an orthrus (two headed dog in case you forgot) or someone with equally talented skills at training as fluttershy to keep him from chasing a butterfly.