I have "discovered" a few too.  I discovered relentless assault on the potion I made to hit 375.  However, today while xmuting an earthstorm diamond, I "discovered" how to xmute primal shadow to primal water.  Not sure if it's random or a certain number of xmutes/creations.  Thus far these are the only two I have "Discovered", however both have come after my xmute specialty.

Dhani 70 mage, 375 alchemist
Misha Server