This article describes a custom creation, custom theme, or other fan material, made by a Brickipedia contributor. It has never been, is not, and will not be officially released.
The Crystal King is a Custom:LEGO Heroes Unite set.
The Final Showdown has begun! Duke and an Astronaut are sneaking into Dr. Inferno's Lair underground, when they see a rocky pillar that leads to the inside! But, 4 Meltrox are inside. As the two prepare for battle, the crystal king leaps out of the shadows! Who will win?