Second, [Lunatic on the Right] had received an enormous boost of some kind "inside Sefirah Castle."
Although [Lunatic on the Right] had an effect bordering on the law of causality, in practice, the harder the outcome was to reverse, the more terrifying the unknown danger he had to bear-every single time.
Just like this time: after reversing Leodero's lightning, it had sent him straight back two hundred years. So unless he had absolutely no other choice, Edward would no longer use this ability lightly.
After he gained access to Sefirah Castle, however, as long as he used [Lunatic on the Right] inside it, Sefirah Castle would bear most of its "negative effects" for Edward through grafting-the amount it bore depended on how much of a role Sefirah Castle could play in the "reversal."
For instance, if he simply wanted to kill someone, borrowing Sefirah Castle's level of existence meant Edward would barely have to pay any price, because this was an ability Sefirah Castle already possessed. He was merely leveraging it through [Lunatic on the Right].
But bringing someone back to life out of nothing, or instantly turning an ordinary person into a half-god or even an angel, would, in a sense, exceed Sefirah Castle's "capabilities."
In short, destruction was far easier than creation.
However, the problem lay in "using it internally." It was literally restricted to the interior-only when Edward was inside Sefirah Castle and used [Lunatic on the Right] on a target also inside it could Sefirah Castle bear the burden for him.
So if he really wanted to kill someone with [Lunatic on the Right], his first step would be to pull them into Sefirah Castle.
How should he put it? This enhancement meant Edward had nothing to fear from anyone below Sequence 0 Above Sefirah Castle.