Powers like that is above him unlike the elf island now the island before could take the power of a Transcendent maybe even stronger.
Now that the island was destroyed in it's peak condition then the danger of this continent is much more greater than he had thought.
He need someone to man the kingdom serving as it's guardian when he was absence.
And who more perfect that Gulli since he was now in the state of breaking through pseudo Transcendent.
Now that the whole continent would be able to accept Transcendent in the near future the laws would be swimming around the continent.
With the breakthrough of the law Gulli would be able to achieve Transcendent Realm if he stayed.
Returning back to the boat Shadowslash started scrutinising the Immemorial Golden Barrier once again.
Judging from the aura it's exudes it was actually getting stronger as time goes by it seems that the golden figure is working hard.