who were the shamans and what did they do
Shamanism A shaman is someone who is regarded as having access to, and influence in, the world of benevolent and malevolent spirits, who typically enters into a trance state during a ritual, and practices divination and healing.[2] The word "shaman" probably originates from the Tungusic Evenki language of North Asia. According to ethnolinguist Juha Janhunen, "the word is attested in all of the Tungusic idioms" such as Negidal, Lamut, Udehe/Orochi, Nanai, Ilcha, Orok, Manchu and Ulcha, and "nothing seems to contradict the assumption that the meaning 'shaman' also derives from Proto-Tungusic" and may have roots that extend back in time at least two millennia.[3] The term was introduced to the west after Russian forces conquered the shamanistic Khanate of Kazan in 1552.
Blue Wizards They are two of the five Wizards (or Istari) sent by the Valar to Middle-earth to aid in the struggle against Sauron. They are called the Blue Wizards on account of their sea-blue robes (each of the other Istari had robes of a different color), and their individual names are given in the Unfinished Tales as Alatar and Pallando. They were both sent to the distant east of Middle-earth, and therefore played no role in the events of the west of Middle-earth, as described in The Lord of the Rings. Consequently, little is known about them.