Ryuk's Potential and Systems Forewarnings

"In what sense?" Ryuk asked with curiosity.

"I can see your cup too. But there's a problem." Isha said as she narrowed her eyes at Ryuk's heart, her gaze filled with confusion.

"When I look into your cup...I can't see its end. You don't understand."

"Others' cups can be easily seen. I can even see the liquid inside, peering straight through and gauging everything at a glance. But you..." She frowned.

"Even when I look directly down at your cup, I can't see its depth. It's incredibly deep. Really, really deep."

"Because it's so deep, I have no idea how much liquid you have inside. That means I have no clue how strong you really are."

"That was why I didn't help out in the battle with the Colossal. I was hoping it would force you to reveal your strength, so I could finally gauge whether that liquid inside your cup is plenty or barely a drop."

Isha's explanation made Ryuk furrow his brows.