Grey Crystal is the center of Grey World. It appeared in two levels. It first appeared in level 4. It was spoiled by Black Water-beings and Hero had to fight for it and lighten it up. It could be seen for the second time in last level, during the final credits.
- It is the least prominent world center as it appeared in 2 levels. It also has to be noted tha Grey World is on the other hand the most prominent world.
- It is the first world center to appear on-screen.