Thats just crazy... and a good example of "design without thought", as is often the case. Five heads on something like a Tarrasque (which has a relatively short neck) is unworkable. A hydra has long necks and relatively small heads, and is the only way it is possible. A 5 headed tarrasque with long necks would just fall over in a multi-face plant and be incapable of moving. A 30 headed ANYTHING is just obscenely ridiculous. You'd need the front end of the animal to look like a string-mop, with a tiny head on the end of each string.
What's he gonna do? Bite my little toe? ;-)
Throwing stats together to make an power-gaming uber-creature is pointless unless the thing actually works as a functioning organism. Does anybody ever actually THINK what their Frankenstein creations are gonna look like?