Spawns herobrine over a pit. Destroy the crystal repeatedly while herobrine shoots fireballs and baby zombie minions at you. Then he will go on land and fight you face to face and when you kill him he drops boots. The boots will light a mob on fire and hold him in the air if you pass one with the boots on.
To spawn Herobrine, right click the Get Items sign. Take the coal and gold and make a 3x3 square with nothing in the middle, like this:
Coal Gold Coal
Gold Gold
Coal Gold Coal
Now put the armor stand in the middle of this square, and watch the magic happen.