当然PHB是这么解释的:Through occult ceremony, you have formed a pact with a mysterious entity to gain magical powers. The entity is a voice in the shadows—its identity unclear—but its boon to you is concrete: the ability to cast spells. 翻译一下就是举行了个仪式,和一个不明实体绑在一起了,然后你就是能施法的法爷了,没了