The Shaman is a unique caster, it allows you to choose what ability score you use with it, additionally, it doesn't work with spell slots, instead having mana points that allow more variety when choosing what level to cast spells at.
A whisper in your ear, strange lights coming from nowhere, the words changing as you read them in a book.
Shamans can connect to the strange world of spirits, not necesarily the realm of the dead, or the astral plane, but somewhere thats in between those two places.
And you can become one! Wield Mana in a unique spellcasting system, specialize into the colors that may or may not be inspired by those of a small, obscure card game, and become a spiritual leader, all within 10 pages of content!
- from the publisher's blurb