Input changes

• Add soul soil

Reason
We can already sift through soul sand so it would make sense that soul soil should also work

Output changes

• Change "Fossilized Fern Spores" to "Melon Seeds" and decrese its chance from 5% to 2%
• Decrease chance of "Bone Meal" from 22% to 20%
• Add "Flint" with a 5% chance

Reason
Fossilized Fern Spores are way to common and we can already get them from Plant Fossils which are already a part of the sifter loot pool so there's no reason to have them there and you won't ever need this many.

Melon Seeds make sense to me because there are already Pumpkin Seeds in the sifter loot pool (which are often put together and they would have the same chance).

The decresed chance of getting Bone Meal is just that the Flint could have a 5% chance.

Since you can sift through gravel it makes sense that you could also get Flint.