Alexandra squinted her eyes and pulled back the flames surrounding Maximus. She could see that he has reached his limit. Her heart started to hurt as she could hear the screams of her soul.
At first, she thought that the darkness has mixed with Maximus' soul, but she realized that the darkness was not able to get a hold of Maximus' soul in its entirety.
When she created the Aion stone, she integrated a spell to recognize each other in their next life. An extension of that spell is the one that connects the feelings of each other. Once they use the Aion stone to bound them together, they could feel the intense feeling of the other person. It won't work on normal emotions but if the other person is in intense pain or suffering, the other can feel a part of that pain.