For the Add-On work properly, please enable experiments and play on version 1.21.100 or higher. 

Potion Making Guide 

First, you'll need to craft a pan to brew your potions. 

After creating your pan, click on it with a bucket of water in your hand to add water to it. 

Depending on the block below the pan, the duration of your potion's effects changes: 

• Campfire - 1:08

• Soul Campfire - 2:00

• Any other block - 0:30

One of the ingredients that can be added is living flesh, to obtain it is simple, you need to kill Hemofishes, red fish that are found in the deep parts of any lake or ocean in the overworld. 

Ingredients

Note: Ingredients can only be added after adding water, and to add them, click on the pan with the item in your hand.

• Wheat Seeds - Adds the speed effect to your potion.

• Cooked Beef - Adds the regeneration effect to your potion.

• Living Flesh - Adds the health boost effect to your potion.

• Sugar - Adds the jump boost effect to your potion.

• Gold Ingot - Adds the haste effect to your potion.

• Feather - Adds the slow falling effect to your potion.

• Glow Lichen - Adds the night vision effect to your potion.

After adding the water and desired ingredients, you need to click on an empty glass bottle in your hand to collect the potion. Each full pan gives you one potion. 

Now, you just need to drink the potion to get the effects.