(the few cower)
Sunset Shimmer: But how? You're a myth!
The Storm King: And you believed the Twilight of Equestria? Alicorns always lie. (snickers) I was imprisoned within my heart turned to stone. Luckily, I had worshippers among humans. They worshipped me and helped in my arrangement for my return. And then we learned about you going on this.
Sunset Shimmer: The cruise.
The Storm King: The perfect trap. As you were the perfect pawns. We knew the darkness of humanity was the key to summoning the power. And it came from you few. Your rainbow-headed friend saved you from becoming cannibals as some youngsters did when they devoured human pieces from certain spies.
(many gasp)
The Storm King: She also saved you few from a shapeshifting assassin. And it was my followers who drugged Applejack, increasing the seasickness. Your rainbow-headed pal risked much. And she tried to warn you. And how did you repay her? Betrayal! So arrogant, greedy, vain, jealous, cynical, cowardly, naive, and headstrong You were perfect pawns!
(the few hang their heads in shame)
Applejack: Eyap.
Rarity: Oh...
Sci-Twi: I'd been a jerk.
The Storm King: Just as your pony counterpart.

This is based on these:
https://www.youtube.com/watch?v=mN1i2Sc4cGM
https://www.youtube.com/watch?v=4llzBi_oyuE