Custom Entities Help? And no net.minecraft.server package?

I'm making a plugin where players can cast spells back and forth. Everything else in the plugin is basically done but the spells. For the spells, however, I need custom entities. But I've been looking for a great day, and I can't find any tutorials that works. Most of them, seem to be using things from net.minecraft.server or whatever, but I don't even have those packages? So I'm completely confused.

If anyone could head me in the right direction, it would be much appreciated.
Thanks.

 

What u mean by custom entities?

 

Samthelord1 Say a fireball that moves differently, spits out fire particles, and it's explosion is bigger.

 

Fireball or magma cube?

 

Samthelord1 It was an example, but I would say fireball. I'm not wanting a LivingEntity, just an Entity/Projectile.

Still haven't found a solution. Can anyone help?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

For custom entitys you need to use NMS, I can teach you a little, its quite advanced but if you're up for it...
If you want some teached, PM me.

 

You have to import craftbukkit.jar, the actual server jar, not just bukkit.jar.