Dancer In The Dark

When the Turtles go into the main Krang head quarters, they did not expect it to be destroyed already. Nights later, they are attacked by a mysterious figure, that leaves a symbol after defeating them. When the turtles tell Splinter about this, he immediately tells them to bring this figure to him. What happens when this figure is Splinter's old apprentice?

-Written By Fawnsune-