This is an only one command vanilla mod for Minecraft 1.9! It is a work in progress but it adds Herobrine to your game! All you have to do is rename a witch to Herobrine and watch the madness begin!


Command:

/summon Item ~ ~4 ~ {Age:5996,Passengers:[{id:FallingSand,Time:1,Data:0,TileID:152,Passengers:{id:FallingSand,Time:1,Data:0,TileID:157,Passengers:{id:MinecartCommandBlock,Command:buffer,Passengers:{id:MinecartCommandBlock,Command:"setblock ~3 ~-1 ~-7 repeating_command_block 1 replace {Command:/kill @e[type=Witch,name=Herobrine]}"},{id:MinecartCommandBlock,Command:"setblock ~3 ~-1 ~-5 command_block 3 replace {Command:/effect @e[type=Zombie,name=Minion] minecraft:speed 1000000 4}"},{id:MinecartCommandBlock,Command:"setblock ~3 ~-1 ~-3 repeating_command_block 4 replace {Command:/tp @e[type=Zombie,name=Minion] @e[type=Zombie,name=Herobrine]}"},{id:MinecartCommandBlock,Command:"setblock ~4 ~-1 ~-8 command_block 1 replace {Command:/tp @e[type=Skeleton,name=Minion] @e[type=Zombie,name=Herobrine]}"},{id:MinecartCommandBlock,Command:"setblock ~4 ~-1 ~-6 command_block 1 replace {Command:/tp @e[type=Zombie,name=Herobrine] @e[type=Witch,name=Herobrine]}"},{id:MinecartCommandBlock,Command:"setblock ~4 ~-1 ~-4 repeating_command_block 1 replace {Command:\"/summon Zombie ~ ~1 ~ {HandItems:[{id:iron_sword,tag:{ench:{id:16,lvl:1}]}},{}],ArmorItems:[{id:leather_boots,tag:{display:{color:0}}},{id:leather_leggings,tag:{display:{color:0}}},{id:leather_chestplate,tag:{display:{color:0}}},{Damage:3,id:skull,tag:{SkullOwner:ZombieBrine}}],CustomNameVisible:1,CustomName:\\\"Minion\\\"}\"}"},{id:MinecartCommandBlock,Command:"setblock ~5 ~-1 ~-4 repeating_command_block 3 replace {Command:\"/summon Zombie ~ ~1 ~ {HandItems:[{id:iron_sword,tag:{ench:{id:16,lvl:1}]}},{}],ArmorItems:[{id:leather_boots,tag:{display:{color:0}}},{id:leather_leggings,tag:{display:{color:0}}},{id:leather_chestplate,tag:{display:{color:0}}},{Damage:3,id:skull,tag:{SkullOwner:ZombieBrine}}],CustomNameVisible:1,CustomName:\\\"Minion\\\"}\"}"},{id:MinecartCommandBlock,Command:"setblock ~5 ~-1 ~-3 command_block 2 replace {Command:/effect @e[type=Zombie,name=Minion] minecraft:resistance 1000000}"},{id:MinecartCommandBlock,Command:"setblock ~6 ~-1 ~-9 chain_command_block 4 replace {auto:1b,Command:/effect @e[type=Zombie,name=Herobrine] minecraft:speed 1000000 2}"},{id:MinecartCommandBlock,Command:"setblock ~6 ~-1 ~-8 chain_command_block 2 replace {auto:1b,Command:/effect @e[type=Zombie,name=Herobrine] minecraft:resistance 1000000 3}"},{id:MinecartCommandBlock,Command:"setblock ~6 ~-1 ~-7 chain_command_block 2 replace {Command:/effect @e[type=Zombie,name=Herobrine] minecraft:strength 1000000 10}"},{id:MinecartCommandBlock,Command:"setblock ~6 ~-1 ~-6 command_block 2 replace {Command:\"/summon Zombie ~ ~1 ~ {HandDropChances:[2.0f,0.085F],ArmorDropChances:[1.0f,1.0f,2.0f,0f],HandItems:[{id:golden_sword,Count:1,tag:{ench:{id:34,lvl:40},{id:19,lvl:3},{id:21,lvl:10},{id:12,lvl:1},{id:16,lvl:71}]}},{}],ArmorItems:[{id:leather_boots,Count:0,tag:{display:{color:4210752}}},{id:leather_leggings,tag:{display:{color:3029133}}},{id:leather_chestplate,tag:{display:{color:3042953}}},{Damage:3,id:skull,tag:{SkullOwner:Herobrine}}],CustomNameVisible:1,CustomName:\\\"Herobrine\\\"}\"}"},{id:MinecartCommandBlock,Command:"setblock ~6 ~-1 ~-3 repeating_command_block 1 replace {auto:1b,Command:/effect @e[type=Witch,name=Herobrine] 14 1000000}"},{id:MinecartCommandBlock,Command:fill ~2 ~-2 ~-10 ~7 ~-2 ~-2 stained_hardened_clay 9},{id:MinecartCommandBlock,Command:fill ~2 ~-1 ~-10 ~2 ~0 ~-2 stained_glass 7},{id:MinecartCommandBlock,Command:fill ~2 ~1 ~-10 ~7 ~1 ~-7 stained_hardened_clay 9},{id:MinecartCommandBlock,Command:fill ~2 ~1 ~-6 ~3 ~1 ~-2 stained_hardened_clay 9},{id:MinecartCommandBlock,Command:fill ~3 ~-1 ~-10 ~7 ~0 ~-10 stained_glass 7},{id:MinecartCommandBlock,Command:fill ~3 ~-1 ~-2 ~7 ~0 ~-2 stained_glass 7},{id:MinecartCommandBlock,Command:fill ~4 ~1 ~-6 ~5 ~1 ~-5 stained_hardened_clay 9},{id:MinecartCommandBlock,Command:fill ~4 ~1 ~-4 ~5 ~1 ~-4 stained_glass 7},{id:MinecartCommandBlock,Command:fill ~4 ~1 ~-3 ~7 ~1 ~-2 stained_hardened_clay 9},{id:MinecartCommandBlock,Command:setblock ~6 ~1 ~-6 stained_glass 7},{id:MinecartCommandBlock,Command:fill ~6 ~1 ~-5 ~7 ~1 ~-4 stained_hardened_clay 9},{id:MinecartCommandBlock,Command:fill ~7 ~-1 ~-9 ~7 ~0 ~-3 stained_glass 7},{id:MinecartCommandBlock,Command:setblock ~7 ~1 ~-6 stained_hardened_clay 9},{id:MinecartCommandBlock,Command:"setblock ~6 ~-1 ~-4 unpowered_comparator 0 replace {OutputSignal:0}"},{id:MinecartCommandBlock,Command:fill ~3 ~-1 ~-9 ~4 ~-1 ~-9 redstone_wire},{id:MinecartCommandBlock,Command:setblock ~3 ~-1 ~-8 unpowered_repeater 14},{id:MinecartCommandBlock,Command:setblock ~3 ~-1 ~-6 unpowered_repeater 14},{id:MinecartCommandBlock,Command:setblock ~3 ~-1 ~-4 unpowered_repeater 14},{id:MinecartCommandBlock,Command:setblock ~4 ~-1 ~-7 unpowered_repeater},{id:MinecartCommandBlock,Command:setblock ~4 ~-1 ~-5 unpowered_repeater 2},{id:MinecartCommandBlock,Command:setblock ~4 ~-1 ~-3 unpowered_repeater 1},{id:MinecartCommandBlock,Command:setblock ~4 ~0 ~-8 redstone_wire},{id:MinecartCommandBlock,Command:fill ~4 ~0 ~-4 ~5 ~0 ~-4 redstone_wire},{id:MinecartCommandBlock,Command:setblock ~5 ~-1 ~-6 unpowered_repeater 3},{id:MinecartCommandBlock,Command:setblock ~6 ~-1 ~-5 unpowered_repeater},{id:MinecartCommandBlock,Command:setblock ~6 ~0 ~-6 redstone_wire},{id:MinecartCommandBlock,Command:tellraw @a [{"text":"Thanks to pigking188 for making this vanilla mod","color":"gold"},{"text":"\nwww.youtube.com/pigking188","color":"white"}],Passengers:[{id:MinecartCommandBlock,Command:/kill @etype=Item,r=4],Passengers:[{id:MinecartCommandBlock,Command:setblock ~ ~ ~ air,Passengers:{id:FallingSand,Time:1,Block:minecraft:command_block,TileEntityData:{Command:kill @etype=MinecartCommandBlock,r=4],auto:1},Passengers:[{id:FallingSand,Time:1,Block:minecraft:command_block,TileEntityData:{Command:fill ~ ~1 ~ ~ ~-2 ~ air,auto:1}}]}]}]}]}]}]}]}]}