Making a Bottle Of Corrosion
What You Need
The Bottle Of Corrosion is one of the mod's registry items and is produced through a crafting recipe. Gather the ingredients listed in your recipe book for the Bottle Of Corrosion entry, then craft it at a crafting table. Because the recipe is registered as either shaped or shapeless depending on the grid, open the recipe book in your crafting table and click the Bottle Of Corrosion entry to auto-fill the grid — this avoids guessing the exact arrangement.
Using the Bottle
Once crafted, the Bottle Of Corrosion is a consumable-style item you carry in your inventory. Keep it on your hotbar when exploring areas tied to the mod's blocks, since corrosion effects pair naturally with the Magentur and Watcher's Shroud content.
If you plan to use several, craft them in batches: the recipe scales cleanly, so fill multiple grid slots at once rather than one at a time. Store spares in a chest near your crafting area so you are not re-gathering ingredients each trip.
Pair the Bottle Of Corrosion with a Hypno Bulb setup when you want to control an area — the bottle handles the corrosive side while the bulb handles the distraction. Neither item requires the other to function, but keeping both stocked means you can respond to whatever the mod throws at you without returning to base.