rare ne large fiend 

Perception +42; greater darkvision, true seeing

Languages Abyssal, Celestial, Infernal, Requian; telepathy 100 feet, tongues

Skills Acrobatics +36, Arcana +38, Athletics +42, Deception +43, Religion +38, Stealth +36, Survival +40

Str +10 Dex +8 Con +6 Int +6 Wis +8 Cha +11

Items black sapphires (4, worth 2,000 gp each), +3 greater striking spiked chain.

AC  48; Fort +33, Ref +39, Will +36; +1 status to saves vs. magic

HP 400; Immunities death effects; Weaknesses good 20

Plunder Life (aura, divine, necromancy) 60 feet. When a healing effect restores Hit Points to a non-fiend creature in the aura, the amount of Hit Points restored is halved. The rhevanna gains temporary Hit Points equal to the amount of Hit Points restored. The rhevanna loses any remaining temporary Hit Points after 1 minute.

Attack of Opportunity [R]

Speed 40 feet, fly 80 feet

Melee [>] spiked chain +43 (disarm, evil, magical, reach 10 feet, trip), Damage 3d8+18 slashing plus 3d6 evil

Melee [>] claw +40 (evil, magical), Damage 4d6+18 slashing plus 3d6 evil

Divine Innate Spells DC 45; 10th dominate; 9th bind soul (at will), dimensional anchor (at will), dispel magic, possession; 7th plane shift (at will, self only); 5th dimension door, scrying; 4th dimension door (at will); Constant (5th) detect alignment (good only), tongues, true seeing

Rituals DC 45; call spirit, imprisonment, planar binding

Detaining Strike [F] Frequency once per round; Trigger The rhevanna hits a creature with a weapon Strike; Effect The rhevanna casts an innate dimensional anchor spell on the creature.

Drakel [R] (divine, healing, necromancy) Trigger The rhevanna kills a living creature of at least 16th level; Effect The rhevanna drinks the triggering creature's life force and regains 40 Hit Points. If the triggering creature is a celestial, the rhevanna instead regains 80 Hit Points.

Malefic Binding The rhevanna can target celestials with their bind soul ability, and a gem containing a celestial bound by a rhevanna has Hardness 40. If the rhevanna destroys a gem in which they placed a celestial, the celestial is destroyed forever.

AoE6, page 83.