Use obsidian to make a hell portal, use flint to open the portal and reach the lower bound;
Find and collect Hell warts in Hell Fortress;
Beat witches or use glass bottles;
After getting the glass bottle, go to the river to fill water;
Surround a circle of gold particles on the workbench to synthesize gold carrots outside the carrots;
Use golden carrot and crude liquid medicine to synthesize night vision liquid medicine on the brewing table;
Get spider eyes on cave spiders;
Use sugar, spider's eyes and mushrooms to get fermented spider's eyes in the workbench lattice;
Use fermented spider eye and night vision potion to synthesize stealth potion.