推荐回答（2个）
魔兽里的萨满最早出现在兽人部落里面，时间大约在德莱尼人来到纳格兰的一段时间后兴起。
当时兽人还生活在纳格兰，没有受到萨格拉斯腐化的时候萨满祭祀一度是各个兽人部落最受尊敬的人，比如霜狼氏族的老奶奶，和黑手氏族的耐奥祖。
萨满祭司相信先祖之魂的存在，早期的萨满甚至能和死去兽人的灵魂“先祖之魂”交流、他们崇尚元素和兽人的平衡，尊重元素，祈求元素的帮助。那时候的纳格兰是非常和谐的世界，兽人和德莱尼人和平相处。
直到基尔加丹发现德莱尼领袖先知维纶生活在纳格兰，便用欺骗的手段腐化兽人各部族，（这也是他为什么叫欺诈者基尔加丹）。基尔加丹制造了虚假的先祖之魂欺骗了耐奥祖，使得耐奥祖堕落并联合兽人部族进攻德莱尼，当耐奥祖发现自己被欺骗的时候已经为时过晚，先祖之魂不在回应萨满祭司们的召唤，元素也放弃了和萨满祭司的友好关系，纳格兰世界彻底枯萎。
兽人在耐奥祖的徒弟、燃烧军团傀儡古尔丹的操纵下喝下了恶魔之血（外遇地狱火堡垒里面玛胖的血），变得狂暴嗜血，并跨过黑暗之门进攻了艾泽拉斯的人类王国暴风城。萨满教义也随之一度付之一炬，一直到杜洛坦之子萨尔重拾萨满之道，重建部落，萨满教义才得以延续，但是现在的萨满只能和元素交流，再也无法唤醒先祖之魂了。
呃，楼上虽然回答的很不错但还是回答错了一部分，我来补充吧
兽族很早就开始崇拜动物和祖先，而正式有萨满教还是德莱尼来到德拉诺世界以后的事情了
原因是这样的，德莱尼飞船飞到德拉诺世界的时候坠毁了，某一艘飞船坠毁到沃舒古这个地方，驾驶这艘飞船的纳鲁也重伤快要死掉了。
濒死的纳鲁散发出来的圣光能量吸引了不少兽人祖先的灵魂聚集于此，后来某天某个兽人来到这里，他没发现纳鲁但发现了自己祖先的灵魂（看到他二大爷的灵魂了~），回去以后告诉了其他兽人，于是兽人们纷纷带上贡品去拜祭祖先，其中那些能够看到祖先并和灵魂对话的兽人就被称作萨满祭司，而他们带去的贡品也恰好也让那个濒死的纳鲁活了下来。所以在兽人中就开始正式有了萨满祭司
随后燃烧军团的恶魔头子基尔加丹发现了这个秘密，他偷偷的伪装成兽人祖先灵魂的样子，告诉兽人说德莱尼是坏蛋，要消灭掉他们。而兽人基本对祖先灵魂的话毫不怀疑，回去想了想决定先下手为强，于是就去找可怜的德莱尼人动手了，后来基尔加丹又如法炮制，让兽人喝下了恶魔之血，变成了恶魔的奴隶。而真正的兽人祖先和元素们看到这一切后气的半死，他们一气之下就不管兽人了。------------这在暴雪官方小说部落的崛起中有很详细的描写
第三次战争以后，兽人萨尔恢复了对萨满教的崇拜传统，这才使得萨满教得以发扬光大，但是由于兽人祖先灵魂的气还没有消，所以即使是兽人萨满也无法呼唤祖先的灵魂，即便是萨尔也不行，所以大灾变以后萨尔卸掉大酋长的位置、回到纳格兰，向他的奶奶请教呼唤祖先灵魂的方法
回答完毕，纯属手打，抄袭者自重
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