Hello everyone!
So what I am making is Summoners Rift (from the popular game League of Legends) in minecraft!
The problem is that i need some help :/
1) I need a turret design that act like the turrets in League of Legends
2) I need a shop device again similar to how it works in League Of Legends (You earn currency by completeing objectives, and can then buy things with your earned currency) 
 - My idea for this at the moment is using EXP, but im lost with how to make a shop system with it
3) I need a way to spawn minions that will walk down the lanes and only attack opposing minions and opposing players.

Thanks for all your help!
- Raji890