The ghost boy has paid his dues and now comes face to face with death himself. Can Danny Phantom win and get another chance or will death reap his soul.
Death and War casually topple gigantic demonic creatures and structures. War has strength feats easily topping DD, and he acknowledges several times that Death is much stronger than him.
And Death was so fast he cut War's arm off before any of his three siblings realized it.
He dodges energy beams. Which have no calculated speed. But since they're easily visible and people like Tucker and Sam and other normal humans have dodged similar attacks, they aren't that fast.
Also, Death is billions if not trillions of years old and has seen, fought, and killed pretty much every type of being in existence. I'm sure he's fought an intangible being at least once.