=== Fairy farming ===
This becomes possible after unlocking Lure Fragrance and Paralysis Powder.
Use the Lure Fragrance in the morning, then go to the cave area. You have a high chance to encouter the Death Fairy and after using Paralysis Powder you have a high chance of capturing her (you get 2 tries). In exchange for letting her go she'll give you 15 high level flowers and 1 Elven Fragment.