Dungeons in <
The Fantasy Serpent in the Hurricane cave was the best example of a test of a player's intellect.
While the Serpent could not boast insane attributes like other bosses, it had an considerably over powered skill, [Metamorphosis]. As long as it was about to be attacked, it would transform into its aggressor and use his own strength against him. Killing the aggressor and protecting itself.
Then it would trick the players into answering it's riddles.
These riddle's were seals on the Fantasy Serpent's powers... everytime the player solved a riddle, a portion of the Fantasy Serpent's powers would be unlocked.