This mod adds wild herbs, that are used to make tonics. Tonics give you effects just like potions do (but they are weaker and give small side effects).
Instead of going to the dangerous Nether, you can go exploring, so your biggest enemy is going to be the terrain (or hostile mobs, if you don't sleep). Different biomes have different plants, so try going "round" the world. After getting hands on the wild seeds, you can start farming herbs, or flowers. After all that you can finally brew your first tonic!
(I'm planning an update, it still isn't even close to completed, but the new description should match it)