Princess Twilight Sparkle's Horn is responsive and lights up. You can touch her horn to hear discuss her magical spells. They are either a long or short Horn (Depends on which form Twilight Sparkle is in.), and they glow neon purple and all of Twilight Sparkle's colors, it's Sparkly, It's Magical upon spell, and more, and it also floats, and can also land on anyone's head, and attach themselves to you, and rewrites + overwrites only your brain into being Princess Twilight Sparkle, Show Time!!!! 

[Twilight Sparkle's Horn blocks the way.]