A mod made for SpookyJam 2020.
This mod allows you to brew complex potions in a pumpkin. It also adds 10 new potion effects. First of all craft yourself a Pumpkin Cauldron:
!Pumpkin Cauldron
Now put some water in using a bucket. The first ingredient for every potion are nether warts. After that you can throw an effect item in to add a potion effect to the potion. After that you can throw in almost any vanilla item and a few special blocks to modify that effect. Every item modifies different effects in different ways. Here's a list which item adds which effect;
Additionally there are some foci that alter the whole potion. Those can be thrown in at any time:
Some other things to keep in mind:
When your potion is ready you can right click with an empty bottle to get a Halloween Potion. If you want to brew that potion again right click the cauldron with a book right after you brewed the potion to get a potion recipe. Then put a lectern next to the cauldron, put the book on the lectern and put some water into the cauldron. You'll now always see which item you have to throw in.