Battle Ground
Ryu remembered being stunned and then laughing when his mother had said this. But, he knew that she was very much serious.
Rather than choosing Ice and Lightning, Ryu's mother had assimilated the Eastern Heavenly Wind, the Wind of Sharpness, into her Dao instead. One blade was as swift as the wind and the other was as swift as lightning. Even though Ryu himself had already reached the point where he could vaguely see the battle prowess of Cosmic Seed Realm experts over the horizon, he knew that his current self wouldn't' stand a chance against his mother.
The truth was that Ryu's mother and father were probably no less talented than Sarriel, maybe a step below due to their lack of Heavenly Pupils. They weren't the type of people Ryu could challenge across three Realms. He would have to be at least well into the Dao Pedestal Realm to spar with his parents of back then.