Perks are a range of things you can have access to in-game.
Includes things like access to /nick, chat colours, etc.
Blue Fire
Unlock the ability to use blue fire! Better and blue-er than ever!
(Note that you can only use blue fire with moves that are mastered [level 10]. Even with this perk, you will have to level your moves up.)
Extra Set Home
Need another /sethome? This perk will allow you to set a 2nd home.
Discord Chat
Ever wonder how you see players talking in-game without being online?
This perk allows you access to a special discord channel that sends messages in-game. It's a great way to keep with players while you're not playing!
Silk Spanwers
Ever find a mob spawner and wish you could take it home with you?
This perk will allow you to mine and replace mob spawners! Note that it requires a silk touch pickaxe in game, and does not allow you to change the spawner type with spawn eggs.
Chat Colours
Spice up your chat with some colour!
This perk will allow you to use colours and other formatting in chat and on signs.
Command Pack
Get access to special commands in-game!
This perk will give you access to a range of commands in-game.
This includes:
/near (Lists players nearby)
/craft (opens a portable crafting table anywhere)
/getpos (quickly gets your current coordinates)
/enderchest (opens a portable enderchest anywhere)
/feed (fills your hunger bar up!)
/hat (lets you wear many items as fashionable caps)
Player Heads
Get access to the head shop!
This perk will allow you to buy player, mob, and block heads for decoration.
Extra Bending Bending Presets
Want to make more bending presets! This is the perk for you! You will get an extra 4 presets, for a total of 8.
Nickname
Use a custom nickname in chat!
This perk will allow you to use /nickname to create custom (and coloured!) nickname in game.