Isabelle then said, "Don't worry. Let's start the training."
And Briny said, "What do we need to do, mom?"
Isabelle then said, "It's very simple. You just have to survive."
On hearing this, Zoe and Briny frowned, and Zoe said, "What? What do you mean mom? We need to survive against who?"
Isabelle then looked at her daughters with a slightly scary smile, and then said, "Against who?"
Right after that, six bright spots appeared behind her, and then she said, with the same scary smile on her face, "You need to survive against me."
Right after she said this, even though she was already underwater, Isabelle generated some water vortices around her, from which came out several pillars of water towards Zoe and Briny.
When they saw this, the two quickly made a water barrier appear in front of them, blocking the water pillars.
Soon after that, Zoe said, "Mom, what are you doing?! Explain it to us!"
And Briny said, "That's right!"
