Even the most despicable and evil Tyrant will be convinced they pale in comparison to this monstrosity.
"What, another murder?! How can this happen?! No leads at all? I didn’t think so. Something’s got to be done about the children, I suppose…"
"A doll for your child, sir? Only two coin. My dolls want to be played with, sir. That’s why they were made. They’re very special dolls, sir."
Princess Matriax was the daughter of Lord Greybaer, known from the war as "The Butcher of ..." a handful of towns and a couple provinces. If that wasn’t enough, the princess had her own guard, troupe of guards, that was hers to see trained and use as she see fit.
She didn’t need a defender, not in the sense of some bodyguard. She was quick to take offense, because it amused her to have an excuse to strike people herself, to "quell the insurgents" herself.
She uses her purse to bash people. Her purse is her defender.
The wall unsealed, Mirror Serpent peered inside, ready to gaze upon the riches within. But he recoiled. There was only a withered corpse, and in its hands, a flickering lantern…
Rather than making a baddy impossible to hit, consider giving it mega-hit points.
Super hard to hit leads to great player frustration. Allowing them to do damage leads to a sense of accomplishment. another variation of this would be to give the bad guy a forcefield that shows damage.You could also give them a mastermind ability that sluffs the damage of to minions who should be easy to kill.Once in a while a super high to hit encounter is ok ,but it should be few and far between.
Your mileage may vary