Scared of the possibility, Isaac immediately reinforced the boat.
As Theo said earlier, the sea rose as a huge bubble appeared in front of them. This was a similar bubble as the water spout earlier, but the water spout would form right when they crossed the bubble with this distance.
This was what Theo had seen this whole time. After seeing the flux of Magic Power, Theo found numerous Magic Power fluctuations appearing beneath the ocean. It was clear that they were going to come at them.
That was why he sent all those swords as baits, trying to see who would come out of the water and who would attack them from below.
When he saw this giant bubble, Theo smirked and asked, "Maya, can this boat withstand that one?"
"A few times!"
"Make it work." Theo then turned to Isaac. "Prepare for gravity skill. Put it to four of us, not the boat."
"Eh?" All the colors left Isaac's face as he started regretting coming to the sea now.