Phantom and Wheel of Suppression.

"Flashback crystal?" The black-robed men were all attracted by the crystal scepter in Lotte's hand. They could not help but suck in a breath of cold air and said, "Holy Prince Lotte, you actually have such a precious thing."

Lotte focused on carving the array on the ground and said, "The memory array carved by the flashback crystal can capture images from a period of time ago. It is a very useful method to explore the enemy's situation."

They did not notice that while they were talking, another black-robed man behind them had his pupils dilated. He suddenly fell back and instantly disappeared from the spot.

A black-robed man frowned and said, "I've never been clear about how this thing works. To be able to see what happened before is already beyond my understanding."