A few days ago I played in a 3.P one-shot. I was a red-painted Warforged named Null with the Psiforged Body feat, dotting my armor in crystals, and wore a magnificently flowing yellow cape. Three levels in Swordsage let me be nimble, execute multiple attacks per turn in spite of only being level 3, and enabled me to selectively charge my weapon (a bastard sword made of Riverine, a rare material that is literally a wall of force shaped into an item) with fire or cold damage. I had been given the sword free of WBL consideration, as it offered no mechanical benefit at the level we were playing at, so I spent the entire rest of my money on a psionic tattoo of Energy Burst. While using it, I fluffed it as my charging energy into my fist and slamming the ground.
Nobody caught on until after the game was over.