This is how The Last Stand with Umarak goes in
Twilight Sparkle: Umarak, friendship is more than just a weakness!
Umarak the Destroyer: So you say. But you forget, I have been bathed in your Magic of Friendship...Princess Twilight Sparkle. It was you who filled me with the power I needed. [chuckles evilly] And you didn't even know.
Twilight Sparkle: But how?
Umarak the Destroyer: I needed your magic to make me who I am now.
Twilight Sparkle: That may seem true but it's not.