The procedure was a success, and although Stitches hadn't completely healed the whale yet, there wasn't any longer a trail of mana for the void beasts to chase after. However, Toz's fears came true.
The frenzied void beasts weren't about to let the prey they had chased through half the Void escape just because there wasn't a trail of mana to follow any longer, not to mention the juicy island on top of the whale.
The void beasts had never needed a trail of mana leading from the island to find it. While the trail of mana leading the void beasts on was gone, they had instead gotten a beacon to show them the way.
Thankfully, Toz's worries had allowed Lucy to prepare.
As soon as Lucy sensed that the mana leaking from the whale stopped, Lucy told Toz and the others to stop firing magic like maniacs. Lucy was going to try and hide them and the island from the void beasts. Spells and magic attacks would both disrupt Lucy's magic and reveal their position to the void beasts' detection.