"Perhaps it was meant to divide them?" Kuonji Alice thought for a moment before asking, "Setting that aside, what are you planning to do? Do you need me to reinforce the mountains first?"
"I'll do it. This area is too large—if you use reinforcement magecraft, you might not have enough mana." Rimuru pressed himself against the barrier and pondered. "The barrier itself is connected to the Leyline, and at the center of the Leyline is the Greater Grail... Great Sage... I think..."
In the original story, Rimuru had devoured Veldora through a barrier. Not only had he gradually digested the barrier, but he had also been able to accept Veldora's mana and... acquire Veldora's attributes. Looking at this similar thing now, Rimuru suddenly remembered that while, as a Phantasmal Species, he converted ambient mana quickly and possessed more mana than most magi, he ultimately... still lacked a nuclear power plant.
And now, this Leyline... while it would become something like a giant disposable battery once he swallowed it, it was still a lake-sized reservoir of mana. It would definitely let him splurge for quite a while.
"Possible!" Great Sage was linked to Rimuru's mind. Before Rimuru could finish, Great Sage hurriedly said, "There is absolutely no problem. Since the barrier is connected to the Leyline, it should be possible to analyze the Greater Grail through the Leyline. And there is another advantage to this."
"What?"
"If the Greater Grail is inside your body, then seven years from now, you must either completely digest it and turn yourself into a Greater Grail capable of housing Heroic Spirits, or... you will need to replenish the Greater Grail's mana at that time. And... by then... the Greater Grail will have stored partial projections of every Heroic Spirit's power... if you swallow the Greater