影骨/太阳召唤：黑幕怎么就把人类变成怪物涡克拉？

黑幕以及它里面的怪物涡克拉是影骨世界第一季中最可怕的威胁，
然而黑幕的历史背景也揭示了，这些怪物他们曾经也是人类，这一可怕且隐秘的真相。
黑幕，也称虚海，黑暗的海洋，它把拉夫卡王国一分为二，是几个世纪前由黑暗异端创造的。
原著传说是某次小科学实验失败造成的，而剧集中直接给我们看到了那个历史的真相。
在格里沙的世界，黑暗本身也是个巨大的威胁，但它也是怪物涡克拉的家园，这种飞行的生物以捕食想要穿越黑幕的人类为生。
涡克拉怪物被大多数人认为是单纯生活在黑幕中的怪物，但阿丽娜·斯塔科夫从暗主母亲巴格拉那里了解到，黑幕被暗主创造的同时，也把当时生活在那里的人类变成了涡克拉。
当第一部队派她和玛尔乘坐沙船穿过黑幕时，阿丽娜第一次遇到怪物涡克拉。
这些凶猛、怪异、长着翅膀的怪物迅速袭击了阿丽娜他们的沙船，用他们锋利的爪子抓走了几个活人，
并抓伤了阿丽娜和玛尔，但阿丽娜的太阳召唤者的力量将他们赶走:
作为黑暗的生物，光明能够伤害涡克拉。
后来，格里沙的老师巴格拉，暗主的母亲，讲述了关于涡克拉的历史真相:
“The Fold was no mistake.” Baghra dropped her hands and the swirling darkness around her melted away. “The only mistake was the volcra. He did not anticipate them, did not think to wonder what power of that magnitude might do to mere men.” My stomach turned. “The volcra were men?” “Oh yes. Generations ago. Farmers and their wives, their children. I warned him that there would be a price, but he didn’t listen. He was blinded by his hunger for power. Just as he is blinded now.”影骨237