When Adam acquired the Ancient Energy, the Dark Energy, the Frenzied Flame, or the Soul Stance, he did so not to gain the ability to influence the Grand Barrier, but to become stronger.
But Amelia hadn't lied to him, these four powers were indeed one of the foundations if he wanted to destroy the Grand Barrier.
That is precisely why, sooner or later, every K4-Phantom had to acquire the Dark Energy, for example.
Sure, it wasn't easy. It required effort, but eventually, every K4-Phantom strong enough managed to accomplish this task.
The Frenzied Flame and Soul Stance were also among the anchors, though they weren't energy types.
They both influenced a Phantom's aura, one more subtly, the other more actively. Either way, each anchor made a Phantom significantly stronger, allowing it to reach the limit of the First Circle faster.
