To summon Herobrine, you need create the totem:
- 2 Gold blocks
- Herobrine totem
(To make this block you need a netherrack in the center of the Crafting Table, and 8 bones around)
- Netherrack.
Place the two gold blocks on top of each other, then the totem block, and on top of the netherrack, light it with a flint and steel.
This mod adds animals with white eyes, and some structures. Herobrine will always try to kill the player.
This mod may not work properly on servers.
For more details, check the official page.