Stock Hammer

Stock Hammer drops one item into a shop: a seed in the Seed Shop or a gear in the Gear Shop. The wiki gives no further detail, so it does not say which seed or gear comes up, and no mutation or growth bonus is attached.

It works on the same side of the game as Restock Fever and Seed Rain, the other weathers that deal with shop stock. The wiki also files it among the weathers with no icon.