Evil.

He deceives, he lies, he kills, he destroys.

Intelligent.

He's a genius. He can answer any question instantly, without hesitation. Part of what makes him so hauntingly terrifying, is his ability to outwit his enemy without hardly trying.

Prideful.

His pride is inflated. Elevated to the point where he cares about nothing but himself.

His pride.... will also be his downfall.