Ender Fly is a Plugin which allows you to fly in SMP by the power of the End!
First you need to craft an EnderFly as shown below
Now you need to refill it
Each ender pearl will give you 10 seconds of flight time.
Note: If you add ender pearls to the crafting grid one by one the description of the EnderFly will not update but once you craft it you will still recive the maximum amount of flight time possible
After your refill, equip the chestplate and activate it by middle clicking the chest. Now it should look something like this:
To deactivate it, simply click the chest again or land. Once the time runs out the EnderFly will also deactivate
Note: Sprinting is 3x as expensive as normal Flight