There was no way he could survive that blow, not even if he had his wand. Well, maybe if he had his wand, but then he'd have to have enough control to not accidentally blow himself up.

His shriek grew more piercing, more momentary as he cut himself off, trying to slash at the first bit of mutated turtle he could possibly reach; he was dead sure it wasn't going to do anything, especially since he was caught unawares halfway through the motion by the sudden force of the blow. Sure enough, Don's strength wasn't to be toiled with, and Draco was no longer dead sure about anything, but merely dead. At least it had been quick this time around.

He fell back, dropping to the ground limply for Don to do with what he saw fit.