Spell to summon evil

Why would you want to summon evil
Many people who summon evil end up possessed by bad spirits themselves,

I don't believe so, and even if I did know one, I wouldn't give it to you. Summoning more evil into this world, on top of the evil that is already here in different forms, will do not good at all.

What kind of person are you, who wants to know a spell to summon evil ?

I don't want to some one asked me I'm a christian

I am sure there are
Even using Ouija boards and doing séances can summon evil spirits

Depends on what you are calling evil. Evil takes many forms.

Although a work of fiction, the book A Wizard of Earthsea by Ursula LeGuin well describes what happens when a person of magickal gifts meddles with the dark. Where does LeGuin do her research, I wonder??