Huge natural magical beast (aquatic, dragon, undead)
Level 25 Solo Controller XP 35000

Initiative +15        Senses Perception +20; Darkvision
Death Pall (Psychic) aura 10; whenever Arstyvrax reduces an enemy in the aura to 0 or fewer hit points, each other enemy in the aura takes 10 psychic damage and takes a -2 penalty to all defenses and saving throws (save ends).
HP 900; Bloodied 450 ; see also bloodied breath
Regeneration 10; see also breath weapon
AC 39; Fortitude 38, Reflex 36, Will 37
Immune disease, poison; Resist 25 acid, 15 necrotic; Vulnerable radiant (if Arstyvrax takes radiant damage or is exposed to direct sunlight, his regeneration doesn’t function on his next turn)
Speed 9, fly 9 (hover), overland flight 12, swim 9
Action Points 2

Sickening Bite (standard, at-will) Acid, Healing, Necrotic

Reach 3; +30 vs AC; 2d8+9 damage (2d8 + 14 against an immobilized target), and the target takes ongoing 5 acid and necrotic damage and is immobilized (save ends both). If the target is already immobilized, it is also weakened until the end of Arstyvrax’s next turn, and Arstyvrax regains 10 hit points.

Claw (standard, at-will)

Reach 3; +30 vs AC; 2d6+9 damage (2d6 + 14 against an immobilized target), and Arstyvrax slides the target 3 squares.

Death's Fury (standard, at-will)

Arstyvrax makes a bite attack and two claw attacks. If possible, he attacks at least two different targets

Snaking Tail (immediate reaction, when an enemy attack within 3 squares of arstyvrax misses him; see text, at-will)

Reach 3; targets the triggering enemy; +30 vs AC; 2d6+9 damage, and the target is grabbed. Sustain Minor: Arstyvrax repeats the attack against the grabbed target. Arstyvrax cannot make this attack as an immediate reaction while he has a creature grabbed in this way, but he can release the grabbed creature as a free action to make this attack against another triggering enemy.

Dominating Gaze (minor, recharge

Ranged 10; +28 vs Will; the target is dominated (save ends). Aftereffect: The target is immobilized until the end of Arstyvrax’s next turn. Arstyvrax can have only one creature dominated at a time.

Breath Weapon (standard, recharge ) Acid, Necrotic

Close blast 5; +28 vs Reflex; 4d8+6 acid and necrotic damage, and the target takes ongoing 10 acid and necrotic damage and a -2 penalty to Fortitude and AC (save ends both). Arstyvrax’s regeneration increases to 15 while any creature is still subject to these effects.

Bloodied Breath (free, when first bloodied, encounter)

Breath weapon recharges, and Arstyvrax uses it

Frightful Presence (standard, encounter) Fear

Close burst 10; targets enemies; +28 vs Will; the target is stunned until the end of Arstyvrax’s next turn. Aftereffect: The target takes a -2 penalty to attack rolls (save ends).

Tomb's Darkness (standard, recharges when first bloodied) Necrotic, Zone

Area burst 3 within 20; +27 vs Fortitude; 2d10+8 necrotic damage. The burst creates a zone of darkness that lasts until the end of Arstyvrax’s next turn. The zone blocks line of sight for all creatures except Arstyvrax. Any creature that starts its turn in the zone takes 1d10 + 4 necrotic damage, and any creature entirely within the zone (except Arstyvrax) is blinded. Sustain Minor: The zone persists.

Alignment Evil        Languages Argon, Common, Draconic, Giant
Skills Arcana +24, History +24, Nature +20, Stealth +25
Str 28 (+21)      Dex 16 (+15)      Wis 17 (+15)
Con 22 (+18)      Int 25 (+19)      Cha 26 (+20)

Published in Dragons of Eberron, page(s) 1.