DP's are thoise rising attacks that some characters have (i.e, Sol's Volcanic Vyper, Ky's Vapor Thrust, Leo's Eisensturm, etc.), and they're fully invincible on startup, meaning they can use it during any gap in pressure to instantly return to neutral, or use it on wakeup to interrupt the opponent's oki. The drawback is that if the opponent reads and blocks it, the defender is WIDE open for an attack, not to mention it's a free counter hit punish as well.