How Do You Shout In Wynncraft?

I have seen a lot of people from many different world than I "Shout" a message. I have been wondering if I can possibly gain that power too. Do you need to be a certain rank or level? If not, then how do you do it?

 

You need to buy a shout bomb from the store.

 

Thanks! Never knew that it cost actual money. (Though it does explain why the same person doesn't shout too often.)