Sphinx Mystery
Large immortal magical beast
Level 19 Brute XP 2400

Initiative +15        Senses Perception +23; low-light vision
HP 224; Bloodied 112
AC 31; Fortitude 30, Reflex 31, Will 32
Speed 6, fly 6

(⚔) Ancient Claws (standard, at-will)

Reach 2; +22 vs AC; 3d10+5 damage.

(⚔) Bite of Ages (standard, at-will)

Reach 2; +22 vs AC; 1d10+5 damage, and the target is knocked prone and immobilized (save ends).

(➶) Riddle Me This (minor, at-will) ✦ Psychic

Ranged 10; the sphinx mystery compels the target to contemplate a riddle. The target is dazed until the end of the encounter or until it answers the riddle. To determine the answer, a creature must spend a minor action and succeed at a DC 25 History check. A target that does not attempt to answer the riddle during its turn takes 2d8 psychic damage at the end of its turn. An ally can provide the answer and end the effect. If an ally ends the effect, the target takes 2d8 psychic damage

⚔ Corrective Mauling (standard, recharges when an enemy fails the history check for riddle me this)

Reach 2; +22 vs AC; 4d10+10 damage, and the target is knocked prone.

ᗕ Great Roar (standard, encounter) ✦ Thunder

Close blast 5; +22 vs Fortitude; 3d10+10 thunder damage and the target is pushed 5 squares and knocked prone.

Alignment Unaligned        Languages Common, Dwarven, Elven, Primordial, Supernal
Skills Insight +26
Str 25 (+16)      Dex 23 (+15)      Wis 28 (+18)
Con 24 (+16)      Int 27 (+17)      Cha 28 (+18)

Published in Monster Manual 2, page(s) 188.