Do you think minecraft needs more bosses?
Do you want a challenge?
Do you love bossfights?

Than this redstone mod is for you!

It adds 5 new bosses into your game
spider king
Bone king
Slime king
Blaze King
king jockey (bone king riding the spider king)

simply install the redstone mod, build and stand in one of the spawners above, and battle a Boss mob

if you prefer, a command to spawn in the schematic can be found here: http://mcstacker.bimbimma.com/#!2823

be sure to tell me what you think!