This is not an empty boast, his purpose is really simple, which is to conduct dream training through the True Dream Realm.
He did contact a deity in advance, but it wasn't the Forest Lady Melikai, it was Lady Strategy, with whom he intended to dedicate this Dream World and transform it into a new holy ground of war, further enhancing the training effect.
Who would have thought the Forest Lady would unexpectedly intervene.
To be honest, he didn't know if this was a coincidence or if she did it on purpose.
The gods behave like this, and often, they do things without notifying you in advance. At least Gaven hasn't reached the stage where Melikai consults him in advance.
In comparison, Lady Strategy is more human-like and is more closely connected with him.
Of course, this is related to Lady Strategy being relatively weaker and more dependent on him. If she possessed the same powerful strength as the Forest Lady, it's uncertain if she would treat him the same way.
