"... Anomaly." That was the first word that came to Gizmo's mind.
The thought had gradually been forming in his mind the more he interacted with Gideon and saw him fight, but it was only after this battle that the distinction had truly made its way into his mind.
The moment Gideon removed whatever seal he had, his entire demeanor had changed.
It had gone from its usual calm and collected state to uncomfortably playful and talkative. And yet he was so much more terrifying like this.
The Nightmare didn't notice it, but that Corruption Poison Gideon had released before had fused with the surrounding space and reality around.
The Nightmare had no idea that as long as it was within this place, it was constantly getting debuffed and weaker. That's why in the end, Gideon had been able to injure it compared to how he didn't even do any damage at the beginning.
In other words, its strength was getting siphoned as the battle progressed.