http://www.youtube.com/watch?v=fiDTKAgGxZ8
The Scarabs suddenly begin flying in a whirlwind pattern.
"I see more of you have come..." echoes a voice.
"Yeah, to da pahtey!" says Grakgut enthusiastically.
"Dis box fer us?" asks Kroz.
"You of the Enfleshed are all the same..." says the voice.
"Oi fink 'e just called us 'umies." whispers 'Eadmangla.
"The first Enfleshed sought to display me. He considered me nothing more than an art piece..." says the voice, "To think, he called me his Honored dead..."
The cloud of scarabs begins to circle the party.
"How delicious their screams were! It was so enjoyable to reduce them to their constituent elements..." the voice says, "Come, Enfleshed, and feel the fury of Khepri the Transforming Strength!"
The Scarabs suddenly coalesce into a vaguely humanoid form, wielding a massive shield and a fanned sword.
"You'ze do scoince? We'ze kan use a scoince box!" yells Kroz excitedly, "You'ze kan get krumped, an' we get yer box!"
"Then let us commence our pleasantries!" Khepri yells.
The Necron Overlord, Khepri the Transforming Strength, was not difficult because of his weapons, no. They were only half the story. He was difficult because while he attacked as a single entity (attacks can be dodged, shielded, etc), his body was a Magnitude 30 Horde of Scarabs (and took damage like one). The players certainly had to watch out for friendly fire, and became their biggest threat to each other. After all, a Dispersion Shield tends to do that. Khepri's Void Blade was also no slouch, with its Entropic Strike ability sapping the players' armor (and dustifying their dresses, to Wazgor's horror). If cornered, Khepri would simply dissipate into scarab form and reconvene in a more favorable position, be it into melee, or meters in the air.
It takes the entire party to focus fire onto Khepri, and it is 'Eadmangla's shot that finally destroys the Overlord. Khepri screams a robotic shriek, and then explodes in a flash of light.