The battle is fought in two stages. Sphinxaur casts level three magic at the party, which can be negated with the proper elemental junctions, so this half of the battle should pose little problems. Physical attacks is likely the only form of damage the party can inflict upon Sphinxaur, but this should pose little threat to a moderately developed party.
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[view·edit·purge]A sphinx is a mythical creature with the body of a lion and a human head. In Greek tradition it is a female with the haunches of a lion, sometimes with the wings of a great bird, and the face of a human, and is mythicised as treacherous and merciless; those who cannot answer her riddle are killed and eaten. Unlike the Greek sphinx, the Egyptian sphinx is typically shown as a man and viewed as benevolent. Both were thought of as a guardian often flanking entrances to temples.