Watermelons. You poor bastards. Always on the receiving end of novelty weapon violence. The Gotcha Cap. The Unbreakable Slugger Umbrella. The Blade Driver Crossbow. And now...the Queen of Hearts. That bitch.
We've always known a royal flush is a cutting move, but that the cards' edges could be made of literal knife blades? This is an interesting development. Throwing cards are similar to throwing knives--sharp, aerodynamic, and, yep, capable of impaling a watermelon. They can also penetrate more rigid surfaces, such as 2 x 6 wood boards, as depicted in the above video.
Cards measure 2.3" x 3.5", true to playing card size, but are made of stainless steel. All 4 edges are honed to level Very Sharp. Knifed-up throwing cards come in sets of 5, and include a 10, Jack, Queen, King, and Ace of Hearts.
Note: The featured photo depicts Bai Dengchun, a 20-something Chinese dude who throws actual playing cards--the cardboard kind--like knives. You're welcome to try to F up a watermelon Dengchun's way too, but you'll probably have better luck with Weapon King's stainless steel models.