是太困难的过程，事实上，经历过炼制往生回天丹的过程之后，许半生不管炼制什么丹药，都显得极其的轻松。
这也难怪，他早已将最难走的那条路已经走过了，现在走的路，或许有些崎岖，可对于那条难于登天的蜀道而言，无异于坦途大道，自然会觉得轻松无比。
并没有费太多的气力，一颗散发着幽幽紫色光芒的丹药，便已经落在了许半生的掌心之间。
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