If one grows weary of African communal chants or Arabian/Persian wailings, I invite your attentions to these Nordic chants of Gregorian scope. Arguably a medieval European pagan`s answer to tribal song from other lands. This series of albums will be a trilogy.
An alternate descriptive: what would happen if Marilyn Manson pursued Gregorian Chant.
The only caveat is that you may be pulled out of a chant state if you understand the language of the chant itself (Norwegian I believe).
The best chants are partially intelligible - words, yet not words that can be received as speech. Thats why Latin is so good for chorus. Or Dwarven (etc.). Such forces you to take them on musical terms.