The Spirit tree focuses on creating witch doctors whose main role in battle is to have better [[mana ]] regeneration and therefore be better spellcasters, to be good at controlling crowds [[crowd control]], and to be being more adapt adept at surviving than witch doctors of other builds. Also, like Like any skill tree focusing on any element of gameplay, it cannot be called a skill tree if it doesn't have [[signature skills ]] that can actually kill. Luckily for us, the Spirit tree has a few cool skills that makes enemies easy to kill, like Haunt, Soul Harvest and Mass Confusion.