Definition

The Omniknight Altar is an altar to spawn the boss Omniknight.

How to spawn the boss

To spawn the boss, just right-clicking on the block so it will open a Gui, In that GUI there are a button that say "spawn boss". just click the button to spawn the boss. 

Obtaining

The block spawn naturally in the OmniknightAltarstructurespawn, at the center of the structure, to obtain the block you can break it, but it's very resistant, becouse the block isn't for break it, so we made it very hard to destroy.