What's a good idea for a sphinx challenge that's not just, you know, riddles?

Go find a book they haven't read and give it to them as a gift.

Writing your own book on the spot does not count.

Explaining how the jews did 9/11.

Source? Google was no help

Duel to the Death by Snu-snu.
Strap yourself monster, cause here comes the Gs

standarized testing

any sufficiently quick witted bloke can figure out a riddle, but only those who sat down and listened to the teacher at school can pass this test

Sphinx-chan's Ultra Quiz by kishibe

I found it using the saucenao app, which you can find here saucenao.com/tools/

Happy trails.

A reverse riddle.
You have to explain precisely HOW teeth are horses.

I did one once where a sphinx summoned three bound demons. One told only lies, one told only the truth, and one was mad and would give a random answer. Each had a name, and the players could ask three questions. Each demon they could name would not have to fight them, each one they named incorrectly would be empowered for the fight.

Its a riddle with various levels of completeness, and your strategy changes based on how complete you think you can get the riddle. Its also worth mentioning that their power is established as truth

>dissing on Monkey Island
Seriously, nigga?

A quiz on knowledge of imperial credo and biographies of The Emperor and major saints.