Gravewyrm (CR 45)
Alignment: Always neutral evil
Initiative: +28 (+20 Dex, +4 Improved Initiative); Senses: blindsight 120 ft., darkvision 60 ft., low-light vision, Listen +77, and Spot +77
Languages: Draconic. May know other languages
AC: 58 (-2 size, +20 Dex, +20 natural, +10 insight), touch 38, flat-footed 38
Hit Dice: 60d12+1020 (1,410 hp; DR: 25/epic and good and silver
Fort +49, Ref +52, Will +46
Speed: 90 ft., fly 150 (perfect)
Space: 15 ft./15 ft.
Base Attack +60; Grapple +84
Attack: Bite +74 melee (2d8+16)
Full Attack: Bite +74 melee (2d8+16) and 4 claws +72 melee (2d6+8) and 2 wings +72 melee (1d8+8) and 3 tails +72 melee (2d6+8)
Special Attacks/Actions: Breath weapon, command undead, death knell aura, energy drain, spell-like abilities
Abilities: Str 42, Dex 50, Con 44, Int 33, Wis 38, Cha 56
Special Qualities: immunities (death effects, paralysis, sleep), negative energy affinity, resistance to acid 30, cold 30, electricity 30, SR 56
Feats: Cleave; Combat Expertise; Combat Reflexes; Dire Charge; Dodge; Great Cleave; Improved Combat Reflexes; Improved Initiative; Improved Sunder; Improved Whirlwind Attack; Mobility; Multiattack; Power Attack; Quicken Spell-Like Ability (inflict critical wounds); Quicken Spell-Like Ability (heal); Spellcasting Harrier; Spring Attack; Superior Initiative; Undead Mastery; Whirlwind Attack; Zone of Animation
Skills: Balance +26, Bluff +86, Concentration +80, Decipher Script +74, Diplomacy +98, Gather Information +29, Hide +12, Intimidate +92, Jump +22, Knowledge (arcana) +74, Knowledge (architecture and engineering) +74, Knowledge (history) +74, Knowledge (local) +74, Knowledge (religion) +74, Knowledge (the planes) +74, Listen +77, Sense Motive +77, Spellcraft +80, Spot +77, Tumble +83, and Use Magic Device +86
Advancement: 61-80 HD (Huge), 81-130 HD (Gargantuan), 131-180 HD (Colossal)
Climate/Terrain: Any battlefield or graveyard
Treasure: Double standard
Breath Weapon (Su): 90-ft. cone of negative energy, damage 3d6 negative levels; Reflex DC 57 half. The save DC is Constitution-based.
Command Undead (Su): A gravewyrm commands undead as a 60th-level cleric. It can use this ability at will.
Death Knell Aura(Su): Any living creature reduced to negative hit points within a 30-foot-radius of a gravewyrm must make a Fortitude save (DC 57) or immediately suffer the effects of a death knell as if cast by the gravewyrm at caster level 60. The save DC is Constitution-based.
Energy Drain (Su): Living creatures hit by a gravewyrm's melee attacks gain four negative levels. The DC is 63 for the Fortitude save to remove a negative level. The save DC is Charisma-based. For each such negative level bestowed, the gravewyrm gains 5 temporary hit points.
Spell-Like Abilities: At will -- detect undead, displacement, greater teleport, haste, inflict critical wounds (DC 27). 3/day -- destruction (DC 30), heal, harm (DC 29), wail of the banshee (DC 32). 1/day -- demise unseen (DC 33). Caster level 60th. The save DCs are Charisma-based.
Negative Energy Affinity (Ex): Negative energy damage heals a gravewyrm as if it were an undead creature.