You have to make a custom slottype for the items. To do this, you need an AS3 client, and the rest is self explanitory. Here's a screenshot of what it'd look like if you do it properly -- h ttp s ://im gur . com / a / PfC QD -- it's super easy once you get the hang of it. As for the custom ability, you would need to look at Projectile.cs aswell as Player.UseItem and Descriptors.cs.