The illusory door of lightning slammed shut with a resounding bang, and William couldn't help but release a long sigh.
The Moon Realm rift was a tricky anomaly, not a typical portal or rift, but a state where the laws of Currere faltered to some extent. Summoning days and traditions like April Fool's Day fell under the broader category of a Moon Realm rift, governed by its own peculiar laws.
Sealing it off entirely required more than just magic spells. In the past, Judgment had used the Seven Holy Spirits' divinity manifestation or remnant Moon Realm Elementium left behind after the Void Incarnation's defeat to close the Moon Realm rifts completely.
But William could temporarily seal a normal-sized rift with his powerful Divine Realm lightning spells. However, without constant magical reinforcement, the seal could only hold for about seven days.
"Seven days…"