The Colours of Magic: Ice cube and Piece of Marble Rock, if Furb of Fun wins.
Bewitched: Bat Wing, Centipede Leg, Goblin Ear, Lancet, Lump of Dirt, Marsh Stalker Beak, Minotaur Horn, Scorpion Tail, Small Flask of Eyedrops, Spider Fangs, Sulphurous Stone and Tarantula Egg. Goblin Ear is usually the most expensive/rarest item on the list.
Hot Cuisine: All items that cannot be purchased from NPCs tend to become more expensive at the time of the event, such as: Sandcrawler Shell, Honeycomb, Blessed Wooden Stake, Bar of Chocolate, Cream Cake, Northern Pike, Young Lich Worm, etc.
Chyllfroest: Fireproof Horn. You can also collect Tinder Boxes during the month of April to make Melting Horns and sell them.
Devovorga's Essence (MWC) : On the day it is active, the price of the Tentacle Piece tends to go up. You can buy them when they're cheaper, and resell them later.
