Shields in One Command!

For survivalists, a shieldsmith villager will spawn randomly around you every so often, with a trade that will allow you to buy shields if you are not trying to play with cheated in items. Shieldsmiths will NOT spawn while you are caving. They will also despawn after a certain amount of time.

- Shield Traits [Blue=Positive / Red = Negative] -

Wooden Shield - Resistance 1 -10% Movement Speed / -15% Knockback Resistance
Iron Shield - Resistance 2 / 25% Knockback Resistance -50% Movement Speed
Diamond Shield - Resistance 3 / 100% Knockback Resistance -80% Movement Speed / -100% Jump Height

NOTE: You must have your shield in your 3rd hotbar slot in order for a shield to work.

Step 1 - Open the pastebin/download link 
Step 2 - Copy the paste and then open up the Minecraft world you would like the vanilla mod on 
Step 3 - Teleport somewhere where the command block wont interfere with your map {example: /tp ~1000000 ~ ~} 
Step 4 - Give yourself a command block with /give @p command_block 
Step 5 - Paste the copied command into the command block 
Step 6 - Power the command block with a redstone block/torch, etc. and your mod will install! 
Step 7 - Once installed, do /setworldspawn at the machine to keep the chunks always loaded (it will not work everywhere if you don't do this) 
Step 8 - Teleport back to where you were (usually by doing the opposite of your first teleport command, example: /tp ~-1000000 ~ ~) and then enjoy your vanilla mod!