It is not just that Qiu Yulong did not know of the existence of the Guardian Origin Dao Body; even if he had known, the Candle Dragon's Day he unleashed would have been unable, and indeed impossible, to drag Jiang Yun’s Guardian Origin Dao Body inside with him.
Simply put, although Jiang Yun’s physical body was inside the Candle Dragon's Day, he had a powerful helper on the outside.
Jiang Yun himself also possessed the blood of a Candle Dragon. Even though he could not cast the supernatural ability of the Candle Dragon's Day, he was at least sensitive to the aura of the Candle Dragon. Therefore, his Guardian Origin Dao Body found the Candle Dragon's Day very quickly.
Chapter 3563