Horned Devil, Aarnott (3.5e Monster)

''You may be looking for the SRD:Horned Devil. This is a homebrew version.''

Horned Devil
A horned devil is 9 feet tall, bears a 14 foot wingspan, and weighs about 600 pounds. They are hulking black and crimson, gargoyle-like, and have a carapace covered with tough spines.

Horned devils are forged over millennia from lesser devils who endure the wars and brutal training of Malebolge. Horned devils are utterly without mercy and unfailingly obedient to their commanders, leading legions of lesser devils in battle, infiltrating enemy posts, or acting as the vanguard of infernal invasions. Mortal spellcasters seeking to summon horned devils may tempt them with offerings of powerful magical weapons.

Strategies and Tactics
Horned devils are bold fighters. They rarely retreat, even against overwhelming odds. They love to fight with their spiked chains, usually singling out the most powerful foes to lock down and eliminate quickly.

They will try to stack infernal wounds onto creatures and are pretty quick to use their fireball and lighning bolt.