By A Mystery Man Writer
You need obsidian in Minecraft to make things like the nether portal and enchanting table. Here are two ways to make and get obsidian in Minecraft.
The Sainted Minecraft Obsidian
How to Make Obsidian in Minecraft, Beginners Must Know!
How to Create an Automatic Obsidian Generator in Minecraft « Minecraft :: WonderHowTo
Mudkip's ObsidianPlus Mod - An Obsidian with a Plus - Minecraft Mods - CurseForge
Minecraft - Obsidian Encasing - Rooster Teeth
How to Make Obsidian in Minecraft: Craft, Use, and Master
Obsidian - Minecraft Guide - IGN
How to use Respawn Anchor in Minecraft: Crying Obsidian details, and more
building with crying obsidian for the first time (sorry for the quality) : r/Minecraft