El Ricktador

Just play an orc

It's entirely false, any race could potentially develop or learn shamanism. Orcs have a specialized practice and culture that synergizes with shamanism and are regarded as the first to do so. In older iterations, druidism and shamanism were considered to be just different spirits being venerated, although I'm unsure of the validity of that currently.

No @Areon. I'd disagree. Players like Fooddude, Cattarh (I believe), Myself and many other veteran orc players (going back to Athera and before) do not hold this position that spirits should be limited to only Orcs.

Personally, I'm of the opinion that a spirit would favor an Orc because they are blessed to be bound by honor. Honor being something that would be highly valued in relation to any pacts of deals a spirit may make with a Shaman. 

Though ultimately any race (maybe not ologs) could be a perfectly fine shaman, shining examples would be Phaedrus and Dakirennis.