Small Feather - Snowy
Easily found in the summer, hard to find in winter. Thank god we're too lazy to include this in the actual RNG though.
Obtainable from traveling activity and is used crafting Feather, Long Feather, Scroll of Alteration, Accessory Blueprint (Small), Keen Sense Potion and Wonderland Potion. Can be sold in the shop for 100 Cr.