Addendum

Phoenikes also say "phoenix," but a lot else is different. For instance, they say "pop" and "bubbler."

Fantasy Dialects

When you think about it, sphinxes probably ended all their sentences in "sphinx," right? Same with phoenices, nagas, rocs, and on and on, mutatis mutandis.

Supply Problems

Sphinxes probably didn't reproduce but rather emerged from the footsteps of hero-kings, which is why we don't see any today. Once there are planet kings, the situation will likely reverse.

Depiction Demystification

Is it possible that sphinxes are depicted with human features in order to commemorate both the beasts and their brave riders? No. It's certain. Now what sphinxes really looked like is impossible to tell at this remove of years, but most likely they could fire blasts from their mouths.

Trend Revolution

Sux: Enchanted greaves.
Crux: Sphinx riders.

Rules of Drama

"If a sphinx is presented in the first act, it must activate its death laser by the third." - Antoine Checksum

Mayvember Is the Month for Spooky Merriment

"Think we'll get a lot of scares, Durg?"
"Doubt it, Gevins. Mayvember is here, so everybody's steeled against it." Durg set about securing the connections between the two halves of the dragon costume. "But we'll scare the people who are ready to be scared, and they're the ones who matter. There."
But what was this? The joined costume fused together and absorbed the two young men wearing it by Mayvember magic! This was the birth of the invincible hero, Draconic King Gevidax!
"What's happening, Gevins?"
"I don't know, Durg! It feels like I've . . . like we've become a real dragon! Maybe we'll scarea few more than we thought."
Gevins and Durg mastered Gevidax's basic movement just in time, for when they returned to their village, the scaring had already begun! But not harmless Mayvember pranks. It was Ur-Sphinx Keptet that attacked! Fight, Gevidax! Rake the enemy, Dragon Claw! Roast him, Dragon Blast! The world's peace is yours to protect. Heaven's Anger Wyrm Sword!
Finis