how do I collect samples I don't even know how to initiate that quest
The "samples" was just a joke with the wich, her ending is in the blue forest, look in the coments below there is the answer somewere, the ring reflect spells, but you can't equip for some random reason, unless you equip on a bunny or something
I think I messed up that ring a bit.
I'll have to check, because it was supposed to be wearable, to be used in the fight with the witch (one of the few bosses that does spells).