This X-ray is great you can see mobs, caves, lava, spawners, Ect... Hope you enjoy.
Step 1: What You Need
What you need for this instructable is
1 Block of TNT
1 Night vision
2 Blocks of your choice
Step 2: What You Do
Drink you night vision dig down and make a hole 3x2 an 2 high. Place your 2 block at one side of the room the place the lever piston and TNT as shone in the picture then get behind the TNT and pull the lever. Its amazing what you can see. I hope you enjoyed this instructable. If you did check out my others. Don't forget to vote. :)