Coding Obsidian rank

[Cyspen]

I buyt an obsidian rank but i dont know what i can whit it can you help me?

 

[Soph]

(This is taken from the http://buy.cubecraftgames.net/ thread)
Whole network:
- Access to coloured chat
- Access to coloured signs
- /Color, Ability to change the colour of your name
- Awesome looking ||Obsidian|| prefix
- Obsidian, purple coloured name in tab and above your head
- 70 Friends
Lobbies:
- Access to tons of features in the vanity menu, for more details check out the vanity menu.
- Claim rewards from reward chests:
* Iron rank's weekly bonus
* Lapiz rank's weekly bonus
* Gold rank's weekly bonus
* Diamond rank's weekly bonus
* Emerald rank's weekly bonus
* Obsidian rank's weekly bonus
SkyWars:
- Vote for chest types (Op/Normal/Basic)
- Vote for time (Day/Sunset/Night)
KitPVP:
- Choose the area to spawn at
Creative:
- Access to worldedit commands (listed at spawn)