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Angel.
To this world's angels, Fang Zheng was not unfamiliar. They weren't like the Artificial Angels akin to Nymph, nor were they real angels, but rather they were more like a force known as 'Angel.' They could appear in various forms and were more like tools than living beings.
For instance, Kurumi's "Chronos," Yoshino's "Ice Construct," and Nia Honjo's "Ratziel" were all like this.
And now, Fang Zheng could feel that within his own body, he possessed the power of two angels.
They were "Unsealing Master" (Michael) and "Ratziel" (Ratziel).
Regarding the power of "Ratziel," Fang Zheng had already learned from Nia that "Ratziel" was an omniscient angel, which could search and display any information in the world that it desired to know. Except it could not foresee the future; anything that had happened in the past and was currently happening could all be presented by "Ratziel."