Abyssal Drake

(From 3.5e Draconomicon: The Book of Dragons - 2003):

The abyssal drake is the horrific result of an ancient breeding program that combines the nastiest elements of demons, wyverns, and red dragons. Originally intended to serve as mounts for mighty demon princes, abyssal drakes proved too unruly for such service. Now they roam the wilds of the Abyss, preying on demons and visitors alike. 

Abyssal drakes resemble their wyvern ancestors, but their dark red, scaled hides betray their fiendish heritage. They have powerful batlike wings, a serpentine neck, and razorsharp claws. 

Abyssal drakes speak Abyssal and Common.

Combat: An abyssal drake retains the aggressive nature of its wyvern ancestors, diving upon prey in a barely controlled descent, strafing its foes with its breath weapon and scattering them with its frightful presence, then picking off lone survivors. 

When using the Flyby Attack feat, an abyssal drake can attack with sting, bite, or both claws. Its claws lack the dexterity to snatch up an opponent, so it contents itself with merely rending its foe. 

An abyssal drake’s natural weapons, as well as any weapons it wields, are treated as chaotic-aligned and evilaligned for purpose of overcoming damage reduction. 

Breath Weapon (Su): 60- ft. cone, every 1d4 rounds, 10d6 special, Reflex DC 20 half. Much like a flame strike spell, half of this damage is fire damage and the remainder is unholy damage (and thus not subject to resistance to fire and similar defenses). The save DC is Constitution-based. 

Frightful Presence (Ex): When an abyssal drake charges, attacks, or flies overhead, it inspires terror in all creatures within 120 feet that have fewer Hit Dice or levels than it has. Each potential victim must attempt a DC 17 Will save. On a failure, a creature with 4 or fewer HD becomes panicked for 4d6 rounds, and one with 5 or more HD becomes shaken for 4d6 rounds. A successful save leaves that opponent immune to that abyssal drake’s frightful presence for 24 hours. Dragons ignore the frightful presence of an abyssal drake, as do other abyssal drakes. 

Poison (Ex): Sting, Fortitude DC 20; initial and secondary damage 2d6 Con. 

Rend (Ex): If an abyssal drake hits with both claw attacks, it latches onto the opponent’s body and tears the flesh. This rending attack automatically deals an extra 4d4+13 points of damage. 

Outsider Traits: An abyssal drake cannot be raised, reincarnated, or resurrected (though a limited wish, wish, miracle, or true resurrection spell can restore life).