Handmade onigiri is a common item, you need 100 of it. Give some time for players to get the combo. Known combo items are on page 1.
One has to be made first. Sucks that it wasn't the one that you wanted. But someone else in your position might have wanted the Ferret. Be smart and only collect stuff to make the set you want, not the stuff for multiple sets. ? If I accepted a trade with 100 of each and I got a large variety of sets I'd be confused. But I'd also have made a mistake. Anyway we have handmade onigiri and Tiny Sprout, what else is new?
CRYSTAL IS A COMBINED ITEM ALSO. However you need to Make a Crystal in order to make the Crystal Cluster.
Just traded a science bb item and got a gummy nope. I also had a ton of distilled darkness that's gone now.