Open a Brewing Stand
Place Blaze Powder in the fuel slot
Add Water Bottles to the bottom slots
Brew Awkward Potions using Nether Wart
Add Ghast Tear to the Awkward Potions to make Potion of Regeneration
Add Redstone to extend the duration
Add Glowstone Dust to increase the potency
Add Gunpowder to make it a Splash Potion
Add Dragon’s Breath to make it a Lingering Potion