Obsidian armor, looks pretty snazzy!
The Obsidian Realm portal within the Obsidian Realm. Spooky.
Dark and spooky!
Emerald Encrusted Obsidian Ore. Wow. Thats a mouthful. This stuff drops valuable emeralds, but is as hard as obsidian!
Obsidian lamps dont need redstone to shine. They can light up the Obsidian Realm for you!
King Obsidian Golems and a Golem Totem.