This is a build I made on top of a spider spawner so I wanted to make it a little bit special. This crystal is made of pure diamond and has been placed on top of the tower to contain the spiders in the dungeon bellow. The crystal has a bright glow during the night. It feeds off spiders experience points but it also accepts spider eyes as a tribute. The crystal passed some power in the tower lighting the inside and connecting to the spawner itself. If you want to take a closer look at it the coordinates are: 175 65 -1680. Remember that if you want to see the crystal in it's full glory come at night.