Shirodar

The main character for 3rd book, bad guy pretty much. based on Shiro darkmatter.

Shirodar - over 700 years old.
His egg exposed to the poisons of a rare extinct snake, this unique dragon has grown to over 41 feet long, with armour plated skin to protect against his own acid spewing zombification fluids, he makes slaves out of any living or preserved creature, being unable to enslave demons, and ice spells being his only weaknesses. he leads 2 other dragons which serve his rule. Part of a dragon empire long dead, he takes over a castle, keeping one human alive, (preferably a woman) to keep him company through his reign.