[True Monarch Donglai] probably never imagined that an ancient beast could possess the ability to mark Dao-Inscribed Divine Stone.
At this moment, he's trapped by the [Heaven-Swallowing Demon Turtle] within the Dao Domain. Despite employing numerous methods, he's unable to break through the domain's encirclement.
If he can't break through the domain, he'll be forced to engage in a war of attrition within it against the [Heaven-Swallowing Demon Turtle].
Originally, with the realm of a Returning Void Stage True Monarch, fighting a war of attrition was nothing to fear against anyone.
Yet now his opponent is the [Heaven-Swallowing Demon Turtle], a powerful ancient beast with devourer abilities.
Within the domain, the [Heaven-Swallowing Demon Turtle] can continually devour the opponent's power to strengthen the domain, which also suppresses the opponent's ability to regenerate energy.
